curl --request GET \
  --url https://api.example.com/v1/projects/{project}/issues/{issue}

{
  "approval": {
    "approvalTemplate": {
      "flow": {
        "roles": [
          "<string>"
        ]
      },
      "title": "<string>",
      "description": "<string>"
    },
    "approvers": [
      {
        "status": "STATUS_UNSPECIFIED",
        "principalId": 123
      }
    ],
    "approvalFindingDone": true,
    "approvalFindingError": "<string>"
  },
  "grantRequest": {
    "role": "<string>",
    "user": "<string>",
    "condition": {
      "id": "<string>",
      "constExpr": {
        "nullValue": "NULL_VALUE",
        "boolValue": true,
        "int64Value": "<string>",
        "uint64Value": "<string>",
        "doubleValue": 123,
        "stringValue": "<string>",
        "bytesValue": "<string>",
        "durationValue": "<string>",
        "timestampValue": "2023-11-07T05:31:56Z"
      },
      "identExpr": {
        "name": "<string>"
      },
      "selectExpr": {
        "operand": "<unknown>",
        "field": "<string>",
        "testOnly": true
      },
      "callExpr": {
        "target": "<unknown>",
        "function": "<string>",
        "args": "<array>"
      },
      "listExpr": {
        "elements": "<array>",
        "optionalIndices": [
          123
        ]
      },
      "structExpr": {
        "messageName": "<string>",
        "entries": [
          {
            "id": "<string>",
            "fieldKey": "<string>",
            "mapKey": "<unknown>",
            "value": "<unknown>",
            "optionalEntry": true
          }
        ]
      },
      "comprehensionExpr": {
        "iterVar": "<string>",
        "iterVar2": "<string>",
        "iterRange": "<unknown>",
        "accuVar": "<string>",
        "accuInit": "<unknown>",
        "loopCondition": "<unknown>",
        "loopStep": "<unknown>",
        "result": "<unknown>"
      }
    },
    "expiration": "<string>"
  },
  "labels": [
    "<string>"
  ],
  "riskLevel": "RISK_LEVEL_UNSPECIFIED"
}