The present invention relates to the field of vehicles. Particularly but not exclusively, the present invention relates to brake of the vehicles, preferably two-wheelers. Further embodiments of the present invention describe an adjuster mechanism of a brake of the vehicle. BACKGROUND The information in this section merely provides background information related to the present disclosure and may not constitute prior art(s) for the present disclosure. Vehicles such as scooter, motorcycle, or three-wheeler include a braking system used for decelerating and bringing the vehicle to halt from moving condition. Generally, the braking system includes brake assembly coupled to each of the front and rear wheels of the vehicle. The brake assembly is used for slowing or stopping a moving vehicle. In vehicles such as two-wheeled and three wheeled vehicles, the brakes are operated through levers mounted on the handlebar or through a brake pedal. The levers would be connected to the brake assembly through a brake cable. After prolonged use of brake, brake shoe or the brake drum undergoes wear. Due to wear of brake components, free play in the brake system increases which ultimately affects the performance of brake. To improve the performance of the brake, the free play of the brake needs to be adjusted. In the existing scenario, such adjustments are done manually using tools where the free play of brake arm is adjusted by adjusting the adjuster nut. Manual adjustment of the free play of the brake is undesirable activity for user. SUMMARY The one or more shortcomings of the prior art are overcome by the system/assembly as claimed, and additional advantages are provided through the provision of the system/assembly as claimed in the present disclosure. Additional features and advantages are realized through the techniques of the present disclosure. Other embodiments and aspects of the disclosure are described in detail herein and are considered a part of the claimed disclosure. The present disclosure discloses an adjuster mechanism of a brake of a vehicle. The adjuster mechanism includes an adjuster nut movably secured to a brake rod coupled with a brake arm. The mechanism also includes a support bracket which is supported by the brake arm and further supports an actuator. The adjuster nut is coupled to the actuator. The actuator is configured to rotate the adjuster nut relative to the brake rod for adjusting the free play of the brake. In an embodiment, the support bracket is defined with a first end and a second end, wherein the first end connectable to the brake arm of the brake. In an embodiment, the mechanism includes a coupler coupling the actuator and the adjuster nut and the actuator is connected to the coupler by a grub screw. In an embodiment, at least a portion of the adjuster nut is defined with profile co-operating with a profile of the coupler for transmitting rotary motion from the actuator to the adjuster nut. In an embodiment, the adjuster nut is defined with internal threads and wherein the brake rod is defined with an external threads for linearly adjusting the position if the adjuster nut relative to the brake rod. In an embodiment, the support bracket and the brake arm is connected to the brake rod through a pin. In an embodiment, the mechanism is adapted to be controlled by a control module communicatively coupled to the actuator, the control module is configured to control the operation of the actuator based on a trigger signal. The control module is configured to receive the trigger signal from at least one of a switch associated with the vehicle to initiate the operation of the actuator and a sensor associated with the brake unit for terminating the operation of the actuator. In an embodiment, the mechanism is adapted to be actuated by the switch between two positions. In first position of the switch, the adjuster nut rotates relative to the brake rod towards one direction and in second position of the switch, the adjuster nut rotates The adjuster mechanism of the present disclosure, facilitate automatic adjustment of the free play of brakes of the vehicle. The adjuster mechanism utilizes actuator and a switch to facilitate tightening and/or loosening of the brakes with no requirement of technician. The adjuster mechanism facilitates ease in adjustment of the brakes of the vehicle. The adjuster mechanism includes the switch to adjust the brake using adjuster mechanism, thereby improving the precision of adjustment which results in improving service life of the brake of the vehicle. Thus, automatic brake free play adjuster mechanism allows free play adjustment of the brake automatically with the help of an actuator, preferably DC motor. It is to be understood that the aspects and embodiments of the disclosure described above may be used in any combination with each other. Several of the aspects and embodiments may be combined together to form a further embodiment of the disclosure. The foregoing summary is illustrative only and is not intended to be in any way limiting. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features will become apparent by reference to the drawings and the following detailed description. BRIEF DESCRIPTION OF FIGURES The novel features and characteristics of the disclosure are set forth in the description. The disclosure itself, however, as well as a preferred mode of use, further objectives, and advantages thereof, will best be understood by reference to the following description of an illustrative embodiment when read in conjunction with the accompanying drawings. One or more embodiments are now described, by way of example only, with reference to the accompanying drawings wherein like reference numerals represent like elements and in which: Figure 1 illustrates a side view of an exemplary vehicle, according to an embodiment of the present disclosure; Figure 2 illustrates a top view of the vehicle having a body frame, a battery storage unit and a storage box, according to an embodiment of the present disclosure; Figure 3 illustrates side view of vehicle, according to another embodiment of the present disclosure; Figure 4 illustrates a magnified view of a rear portion of the vehicle showing the adjuster mechanism of brake, according to an embodiment of the present disclosure; Figure 5 illustrates an exploded view of the adjuster mechanism of Figure 4; Figure 6a illustrates sectional side view adjuster mechanism of Figure 4 showing brake arm in first position; Figure 6b illustrates a view of the brake arm in another position, according to an embodiment of the present disclosure; Figure 7 illustrates a drum brake used in two wheeled vehicle, according to an embodiment of the present disclosure; and Figures 8 illustrates handlebar of the vehicle including switch for operating the adjuster mechanism, according to an embodiment of the present disclosure. Skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and have not necessarily been drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of embodiments of the present disclosure. DETAILED DESCRIPTION While the disclosure is susceptible to various modifications and alternative forms, specific embodiments thereof have been shown by way of example in the Figures 1 to 8, and will be described in detail below. It should be understood, however that it is not intended to limit the disclosure to the particular forms disclosed, but on the contrary, the disclosure is to cover all modifications, equivalents, and alternatives falling within the scope of the disclosure as defined by the appended claims. Before describing detailed embodiments, it may be observed that the novelty and inventive step that are in accordance with the present disclosure resides in free play adjuster mechanism of a brake of the vehicle. It is to be noted that a person skilled in the art can be motivated from the present disclosure and modify the various constructions of the mechanism. However, such modification should be construed within the scope of the present disclosure. Accordingly, the drawings are showing only those specific details that are pertinent to understanding the embodiments of the present disclosure so as not to obscure the disclosure with details that will be readily apparent to those of ordinary skill in the art having benefit of the description herein. In the present disclosure, the term "exemplary" is used herein to mean "serving as an example, instance, or illustration." Any embodiment or implementation of the present subject matter described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusions, such that a device that comprises a list of components does not include only those components but may include other components not expressly listed or inherent to such setup or device. In other words, one or more elements in a system or apparatus proceeded by "comprises... a" does not, without more constraints, preclude the existence of other elements or additional elements in the system or apparatus. The terms like "at least one" and "one or more" may be used interchangeably or in combination throughout the description. While the present disclosure is illustrated in the context of a two wheeled vehicle, however, adjuster mechanism and aspects and features thereof can be used with other type of vehicles as well. The terms "modular vehicle", "vehicle", "two-wheeled vehicle", "electric vehicle", "EV" and "motorcycle" have been interchangeably used throughout the description. The term "vehicle" comprises vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicle, and the like. The terms "front/forward", "rear/rearward/back/backward", "up/upper/top", "down/lower/lower ward/downward, bottom", "left/leftward", "right/rightward" used therein represents the directions as seen from a vehicle driver sitting astride. Free play adjustment of brakes depends upon the user feeling (more lever displacement and poor brake performance) during braking operation and with the proposed mechanism user may perform automatic adjustment of the free play by switch given on handlebar of the vehicle. The free play tightening operation will be done with help of forward switch and loosening operation will be done with the help of reverse switch button by pressing and holding the switch as per the requirement. The actuator will work, when switch (in forward direction or rearward direction) is on holding position only. The energy storage system of vehicle is used to supply the power with the help of voltage converter which will reduce the main supply voltage to required rpm voltage for the actuator. The actuator will rotate the adjuster nut of the mechanism with the help of coupler. The actuator facilitates an automatic adjustment of the free play of the brake shoes of the brake unit of the vehicle. The rotation of actuator by using required rpm voltage of the power, facilitates precise adjustment of the free play of the brake shoes of the brake drum. Reference will now be made to the exemplary embodiments of the disclosure, as illustrated in the accompanying drawings. Wherever possible, same numerals will be used to refer to the same or like parts. Embodiments of the disclosure are described in the following paragraphs with reference to Figures 1 to 8. In Figures 1 to 8, the same element or elements which have same functions are indicated by the same reference signs. Referring to Figure 1, a vehicle (100) according to an embodiment of the present disclosure is disclosed. In the illustrated example, the vehicle (100) embodies an electric scooter type vehicle. Alternatively, the vehicle (100) may embody an IC engine vehicle or scooter type electric motorcycle, without limiting the scope of the invention. The vehicle (100) (herein after interchangeably referred to as the two-wheeled vehicle (100) comprises front end structure (102), a floor board (134), and a rear end structure (104). The front end structure (102) comprises a steering mechanism (113), a leg shield (108), a front ground engaging member (110), a dash assembly (116), a head lamp unit (118), and a plurality of winkers (not shown). The steering mechanism (113) includes a handle bar (114). The handle bar (114) is configured to be rotated by the rider to steer the vehicle (100). The steering mechanism (113) also includes a plurality of front forks (136) disposed at the front portion of the vehicle (100). The steering mechanism (113) is operatively coupled to the front ground engaging member (110) via the plurality of front forks (136). In the illustrated example, the dash assembly (116) is provided on the steering mechanism (113). The dash assembly (116) comprises a display unit (not shown). The display unit displays information relating to the vehicle (100) to the rider. The dash assembly (116) may comprise additional components such as, LED, LCD, GPS, graphical user interface (GUI) etc. without limiting the scope of the invention. In the illustrated example, the head lamp unit (118) is provided on the steering mechanism (113). Alternatively, the head lamp unit (118) may be provided on the leg shield (108), without limiting the scope of the invention. The leg shield (108) is disposed on the front portion of the vehicle (100). The leg shield (108) encloses the steering mechanism (113). The leg shield (108) comprises an inner leg shield (109) and an outer leg shield (111) (also referred to as a front panel). The leg shield (108) provides protection for the feet of the rider of the vehicle (100). In the illustrated example, the plurality of the winkers (not shown) may be provided on the steering mechanism (113) of the vehicle (100). In another example as shown in Figure 3, the plurality of the winkers (189) are disposed on the leg shield (108), without any limitations. The floor board (134) is disposed behind the front end structure (102) and ahead of the rear end structure (104). The floor board (134) provides foot rest for a rider riding the vehicle (100). The vehicle (100) comprises an electronic control unit (ECU) (not shown). The ECU controls various operations of the vehicle (100). The vehicle (100) comprises a front side cover (not shown), a left side cover (not shown) and a right side cover (not shown). The front side cover is disposed adjacent to the floor board (134). The left side cover and the right side cover are disposed on both sides of vehicle body. Referring to Figures 1, and 2, the vehicle (100) comprises the rear end structure (104). The rear end structure (104) is disposed at the rear portion of the vehicle (100). The rear end structure (104) comprises a swing arm (161), a tail lamp (190) and a rear side cover (not shown). The rear side cover is disposed on rear portion of the vehicle (100) and (190) is disposed on the rear side cover. A plurality of turn signal indicators (not shown) are disposed on either side of the tail lamp (190). The rear end structure (104) comprises a rear ground engaging member (184), a power generating motor (179), and at least one suspension device (188) (shown in Figure 1). In the illustrated example, the rear ground engaging member (184) is disposed below a rider seat (112) and the passenger seat (170). The swing arm (161) pivotally coupled to the body frame (106) supports the rear ground engaging member (184). Further, the body frame (106) may comprise additional components such as brackets, frame members etc., to support different components of the vehicle (100), without any limitations. In the illustrated example, each of the front ground engaging member (110) and the rear ground engaging member (184) embodies a wheel. Alternatively, each of the front ground engaging member (110) and the rear ground engaging member (184) may embody a track etc., without limiting the scope of the invention. At least one of the front ground engaging member (110) and the rear ground engaging member (184) is configured to contact a ground surface (G). Referring to Figures 1 and 2, the vehicle (100) comprises at least one storage structure (301). In an embodiment, the at least one storage structure (301) includes an energy storage system (150) and an article storage unit (152). Alternatively, the at least one storage structure may comprise only a storage structure in case the vehicle is an IC engine vehicle. In the illustrated example, the article storage unit (152) is disposed at rear portion of the vehicle (100) and is configured to store articles such as helmet (153), or other articles such as tools (not shown) etc. The energy storage system (150) comprises a plurality of energy storage units (200a, 200b), and a casing unit (300). The casing unit (300) is configured to receive, and store each of the plurality of energy storage units (302). In the illustrated example, the plurality of energy storage units (302) include a first energy storage unit (200a), and a second energy storage unit (200b). In other examples, the plurality of energy storage units (302) may include fewer or more number of energy storage units, such as the first energy storage unit (200a) or the second energy storage unit (200b), without limiting the scope of the invention. The energy storage unit (302) may be embodied as battery cells. 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