anchor.diff:  
   + Response 401 (application/json)
   
  -+ Response 409 (application/json)
  -
   + Response 500 (application/json)
   
   
  
positive.code: 
  + Response 403 (application/json)
  
  + Response 409 (application/json)
  
  + Response 500 (application/json)
  
  
  
negative.code: + Response 500 (application/json)
  
  ### Update user [PUT]
  Update data of user specified by id. User is allowed to edit only him self. Otherwise **403 Forbidden** is returned. In case of user with same username or email **409 Conflict** is returned.
  
  + Request
      + Headers
  