Groww Machine Coding Round

i) Signup  (email, password)
ii) Create Groups - (group name, String emailId) 
    A person creating group is by default admin of the group and a person can be admin of  3 groups at maximum.

iii)Join Groups -  (group name, String emailId) Group can have a maximum of 10 members

iv) Leave Group (group name, String emailId)

Note: If the admin leaves the group, then the first joinee of the group will be the admin.