anchor.diff:  
   Resources related to users
   
  -## Collection [/api/users]
  +## User Collection [/api/users]
   
   ### List All Users [GET]
  +Roles: **[admin]**
   
   + Response 200 (application/json)
   
  
positive.code:             "errorMsg": "Deactivating user failed"
          }
  
  ## User Nickname [/api/users/{user_id}/nickName]
  
  ### Change User Nickname [PATCH]
  
  + Request (application/merge-patch+json)
  
          { 
            "nickName": "New Nickname Value" 
          }
          
  + Response 200
  
  
  + Response 500 (application/json)
      
          {
              "errorMsg": "Modifying user nick name user failed"
          }
          
  
  ## User Roles [/api/users/{user_id}/roles]
  
  ### Change User Roles [PATCH]
  
  + Request (application/merge-patch+json)
  
          { 
            "roles": ["newRole1", "newRoleN"] 
          }
          
  + Response 200
  
  
  + Response 500 (application/json)
      
          {
              "errorMsg": "Modifying user roles failed"
negative.code:                 "email": "admin@a.pl",
                  "created_at": "2017-02-04T10:59:43.684Z",
                  "updated_at": "2017-02-04T10:59:43.684Z",
                  "projects": [],
                  "roles": [
                    "admin",
                    "user"
  