Ability to restrict a user's ability to change passwords (#1018)

* Implemented a new role "Change Password". This role allows you to change your own password. By default, all users will have it. A user can have it removed arbitrarliy.

Removed components that are no longer going to be used.

* Cleaned up some code

API/Data/Repositories/UserRepository.cs

@@ -52,6 +52,7 @@ public interface IUserRepository
     Task<AppUser> GetUserWithReadingListsByUsernameAsync(string username);
     Task<IList<AppUserBookmark>> GetAllBookmarksByIds(IList<int> bookmarkIds);
     Task<AppUser> GetUserByEmailAsync(string email);
+    Task<IEnumerable<AppUser>> GetAllUsers();
 }
 
 public class UserRepository : IUserRepository
@@ -214,6 +215,11 @@ public class UserRepository : IUserRepository
         return await _context.AppUser.SingleOrDefaultAsync(u => u.Email.ToLower().Equals(email.ToLower()));
     }
 
+    public async Task<IEnumerable<AppUser>> GetAllUsers()
+    {
+        return await _context.AppUser.ToListAsync();
+    }
+
     public async Task<IEnumerable<AppUser>> GetAdminUsersAsync()
     {
         return await _userManager.GetUsersInRoleAsync(PolicyConstants.AdminRole);