diff --git a/server-api/db/src/common.rs b/server-api/db/src/common.rs
index dc6a620..1d319f7 100644
--- a/server-api/db/src/common.rs
+++ b/server-api/db/src/common.rs
@@ -4,7 +4,12 @@ use async_trait::async_trait;
 use crate::Response;
 use crate::UBigInt;
 
-pub const NO_CONN_MSG: &'static str = "No connection could be established";
+#[macro_export]
+macro_rules! no_conn {
+    ($spec:literal) => {
+        format!("No connection could be established: {}", $spec)
+    }
+}
 
 /*
  * NOTE: pay attention to work on async in traits for rust
diff --git a/server-api/db/src/lib.rs b/server-api/db/src/lib.rs
index a67becb..759fde4 100644
--- a/server-api/db/src/lib.rs
+++ b/server-api/db/src/lib.rs
@@ -1,6 +1,7 @@
 mod member;
 mod common;
 mod invites;
+mod channels;
 
 use std::vec::Vec;