Add Roles, Users, and Login APIs

[jamesjmeyer210]

• [x] api/role
  • [x] get all
  • [x] get by id
  • [x] add role (with realm)
• [x] api/user
  • [x] add user (with realm)
  • [x] get all (paginated)
  • [x] get by name
  • [x] get by id
  • [x] get by contact info
• [x] api/auth
  • [x] login (accepts a username and password and returns a jwt)