Check if user exist
  GET /users/{email}     
 GET
 /users/{email}
 Check user existence
Parameters
Path Parameters
 email 
 required
   string
Example
awqx@getnada.comResponses
200
401
Unauthorized
object
 statusCode 
 required
   number
401 error 
 required
   string
Unauthorized403
Forbidden
object
 statusCode 
 required
   number
403 error 
 required
   string
Forbidden