List git credentials

{  "$schema": "https://api-dev.tektona.ai/schemas/GitCredentialListBody.json",  "items": [    {      "created_at": "string",      "display_name": "string",      "forge": "github",      "id": "string",      "name": "string",      "owner_user_id": "string",      "repos": [        {          "name": "string",          "repository_id": "string",          "url": "string"        }      ],      "scope": "project",      "updated_at": "string"    }  ]}

{  "$schema": "https://api-dev.tektona.ai/schemas/ErrorModel.json",  "detail": "Property foo is required but is missing.",  "errors": [    {      "location": "string",      "message": "string",      "value": null    }  ],  "instance": "https://example.com/error-log/abc123",  "status": 400,  "title": "Bad Request",  "type": "https://example.com/errors/example"}