feat: add rpc service for org service user credentials search (#400)

* feat: add rpc service for org service user credentials search

* feat: update proto

* feat: update proto

Author: whoAbhishekSah

raystack/frontier/v1beta1/admin.proto

@@ -223,6 +223,17 @@ service AdminService {
     };
   }
 
+  rpc SearchOrganizationServiceUserCredentials(SearchOrganizationServiceUserCredentialsRequest) returns (SearchOrganizationServiceUserCredentialsResponse) {
+    option (google.api.http) = {
+      post: "/v1beta1/admin/organizations/{id}/serviceuser_credentials/search",
+      body: "query"
+    };
+    option (grpc.gateway.protoc_gen_openapiv2.options.openapiv2_operation) = {
+      tags: "Organization";
+      summary: "Search organization service user credentials";
+    };
+  }
+
   // buf:lint:ignore RPC_RESPONSE_STANDARD_NAME
   // buf:lint:ignore RPC_REQUEST_RESPONSE_UNIQUE
   rpc ExportOrganizations(ExportOrganizationsRequest) returns (stream google.api.HttpBody) {
@@ -1317,3 +1328,21 @@ message SearchOrganizationTokensResponse {
 message ExportOrganizationTokensRequest{
   string id = 1 [(validate.rules).string.min_len = 3];
 }
+
+message SearchOrganizationServiceUserCredentialsRequest {
+  string id = 1 [(validate.rules).string.min_len = 3];
+  RQLRequest query = 2;
+}
+
+message SearchOrganizationServiceUserCredentialsResponse {
+  message OrganizationServiceUserCredential {
+    string title = 1;
+    string serviceuser_title = 2;
+    google.protobuf.Timestamp created_at =3;
+    string org_id = 4;
+  }
+
+  repeated OrganizationServiceUserCredential organization_serviceuser_credentials = 1;
+  RQLQueryPaginationResponse pagination = 2;
+  RQLQueryGroupResponse group = 3;
+}