fix: continue as anon if can't fetch user

src/server/auth.rs

@@ -93,7 +93,7 @@ where
 			};
 
 			let user_id = unverified.key_id().replace("#main-key", "");
-			let user = ctx.fetch().user(&user_id).await?;
+			if let Ok(user) = ctx.fetch().user(&user_id).await {
 				let pubkey = PKey::public_key_from_pem(user.public_key.as_bytes())?;
 				
 				let valid = unverified.verify(|sig, to_sign| {
@@ -111,6 +111,7 @@ where
 				// TODO introduce hardened mode which identifies remotes by user and not server
 				identity = Identity::Remote(Context::server(&user_id));
 			}
+		}
 
 		Ok(AuthIdentity(identity))
 	}