feat: lazy load identities of user object

This makes it possible that we can get identities from any user object even if we didn't specify that while getting them from the orm

Signed-off-by: Philip Molares <philip.molares@udo.edu>

src/users/user.entity.ts

@@ -59,7 +59,7 @@ export class User {
   authTokens: AuthToken[];
 
   @OneToMany((_) => Identity, (identity) => identity.user)
-  identities: Identity[];
+  identities: Promise<Identity[]>;
 
   @ManyToMany((_) => Group, (group) => group.members)
   groups: Group[];