Add role to user

This api Add role to user

REST

Fields	Type	Description	Example	O/M
URL	string		`/v1/users/roles/add`	M
METHOD	string		PUT	M
content-type	string	JSON	application/json	M
x-access-token	string	Session token with validity	token	M

{
    "role": "company/employee/account_reviewer",
    "user": "\<user_id\>"
}