Get the calling identity

{  "user": {    "id": "497f6eca-6276-4993-bfeb-53cbbbba6f08",    "handle": "string",    "displayName": "string",    "avatarUrl": "string"  },  "via": "session",  "tokenId": "07dfef4c-e677-4ce6-87a3-cd348338445f"}

{  "defined": true,  "code": "UNAUTHORIZED",  "status": 401,  "message": "Authentication required or credentials invalid.",  "data": null}

{  "defined": true,  "code": "VALIDATION",  "status": 422,  "message": "The input failed domain validation.",  "data": {    "issues": [      {        "path": "string",        "message": "string"      }    ]  }}

{  "defined": true,  "code": "RATE_LIMITED",  "status": 429,  "message": "Rate limit exceeded; retry later.",  "data": {    "retryAfterSeconds": -9007199254740991  }}