issue #165 - Editing addUser method
issue #165 - Fix routing
issue #165 - Edit routing
issue #165 - Fix acceptInvitation method
issue #165 - Fix acceptInvitation method
issue #165 - Edit routing
issue #165 - Fix conflicts
Merge pull request #374 from ndomar/C2_MahmoudGamal_#6_AcceptInvitation

C2 mahmoud gamal #6 accept invitation