Merge branch 'feature-users-authorization'
Done tests for the create method on RoleBusiness.
Add test for the RoleRepository functions.
fixes #3.
Merge pull request #6 from julianespinel/hotfix-check-role-name-is-unique

Hotfix check role name is unique
Merge branch 'develop'
Merge branch 'develop'
Merge branch 'develop'
Add the unique constraint to username and email on the User model. Add tests for this constraints. Fixes #2.
Merge pull request #12 from julianespinel/hotfix-verify-username-is-unique

Hotfix verify username is unique