diff --git a/crates/integr-structs/src/api.rs b/crates/integr-structs/src/api.rs
index 4563655..f26850b 100644
--- a/crates/integr-structs/src/api.rs
+++ b/crates/integr-structs/src/api.rs
@@ -183,6 +183,42 @@ pub mod v3 {
         config : Vec<ConfigEndpoint>,
     }
 
+    impl Default for Config {
+        fn default() -> Self {
+            Self {
+                config : Vec::new()
+            }
+        }
+    }
+
+    impl Config {
+        pub async fn is_default(&self) -> bool {
+            self.config.is_empty()
+        }
+    }
+
+    pub struct Credentials<'a> {
+        ip : &'a str,
+        login : &'a str,
+        password : &'a str,
+        api_key : &'a str,
+        period : &'a str,
+        timeout : &'a str,
+    }
+
+    impl<'a> Credentials<'a> {
+        pub fn from_config_endpoint(endpoint: &'a ConfigEndpoint) -> Credentials<'a> {
+            Self {
+                ip : &endpoint.ip,
+                login : &endpoint.login,
+                password : &endpoint.password,
+                api_key : &endpoint.api_key,
+                period : &endpoint.period,
+                timeout : &endpoint.timeout,
+            }
+        }
+    }
+
     // to prometheus and nmns
     #[derive(Serialize, Deserialize)]
     pub struct MetricOutput {