fix: add randomized pre-authorized_code, access_token and `c_nonc…

…e` (#16)

* feat: add `pre_authorized_code` generator

* fix: fix clippy warning

* test: improve tests, add `test_create_credential_response_with_multiple_subjects`

* fix: increase `generate_random_string` size

agent_api_rest/src/credential_issuer/token.rs

@@ -75,7 +75,7 @@ mod tests {
         body::Body,
         http::{self, Request},
     };
-    use serde_json::{json, Value};
+    use serde_json::Value;
     use tower::ServiceExt;
 
     #[tokio::test]
@@ -111,13 +111,8 @@ mod tests {
 
         let body = hyper::body::to_bytes(response.into_body()).await.unwrap();
         let body: Value = serde_json::from_slice(&body).unwrap();
-        assert_eq!(
-            body,
-            json!({
-                "access_token": "unsafe_access_token",
-                "token_type": "bearer",
-                "c_nonce": "unsafe_c_nonce"
-            })
-        );
+        assert!(body["access_token"].as_str().is_some());
+        assert_eq!(body["token_type"], "bearer");
+        assert!(body["c_nonce"].as_str().is_some());
     }
 }

agent_issuance/Cargo.toml

@@ -17,6 +17,7 @@ derivative = "2.2"
 did-key = "0.2"
 jsonschema = "0.17"
 jsonwebtoken = "8.2"
+rand = "0.8"
 serde.workspace = true
 serde_json.workspace = true
 thiserror.workspace = true
@@ -27,4 +28,5 @@ uuid.workspace = true
 
 [dev-dependencies]
 lazy_static.workspace = true
+serial_test = "3.0"
 tokio = { version = "1", features = ["full"] }