Add Org user revoke feature

This PR adds a the new v2022.8.x revoke feature which allows an
organization owner or admin to revoke access for one or more users.

This PR also fixes several permissions and policy checks which were faulty.

- Modified some functions to use DB Count features instead of iter/count aftwards.
- Rearanged some if statements (faster matching or just one if instead of nested if's)
- Added and fixed several policy checks where needed
- Some small updates on some response models
- Made some functions require an enum instead of an i32

src/api/core/emergency_access.rs

@@ -258,7 +258,7 @@ async fn send_invite(data: JsonUpcase<EmergencyAccessInviteData>, headers: Heade
         match User::find_by_mail(&email, &conn).await {
             Some(user) => {
                 match accept_invite_process(user.uuid, new_emergency_access.uuid, Some(email), conn.borrow()).await {
-                    Ok(v) => (v),
+                    Ok(v) => v,
                     Err(e) => err!(e.to_string()),
                 }
             }
@@ -317,7 +317,7 @@ async fn resend_invite(emer_id: String, headers: Headers, conn: DbConn) -> Empty
         match accept_invite_process(grantee_user.uuid, emergency_access.uuid, emergency_access.email, conn.borrow())
             .await
         {
-            Ok(v) => (v),
+            Ok(v) => v,
             Err(e) => err!(e.to_string()),
         }
     }
@@ -363,7 +363,7 @@ async fn accept_invite(emer_id: String, data: JsonUpcase<AcceptData>, conn: DbCo
         && (claims.grantor_email.is_some() && grantor_user.email == claims.grantor_email.unwrap())
     {
         match accept_invite_process(grantee_user.uuid.clone(), emer_id, Some(grantee_user.email.clone()), &conn).await {
-            Ok(v) => (v),
+            Ok(v) => v,
             Err(e) => err!(e.to_string()),
         }