message: Added billing getInvoice/downloadInvoice endpoint doc
diff: }
  }
  }
  + },
  + "/api/invoices/{id}": {
  + "get": {
  + "security": [
  + {
  + "bearerAuth": []
  + }
  + ],
  + "description": "Get Invoice by id",
  + "parameters": [
  + {
  + "$ref": "#/components/parameters/invoiceID"
  + }
  + ],
  + "tags": [
  + "Billing"
  + ],
  + "responses": {
  + "200": {
  + "description": "Return invoice",
  + "content": {
  + "application/json": {
  + "schema": {
  + "$ref": "#/components/schemas/Invoice"
  + }
  + }
  + }
  + },
  + "401": {
  + "$ref": "#/components/responses/UnauthorizedError"
  + },
  + "403": {
  + "$ref": "#/components/responses/ForbiddenError"
  + },
  + "500": {
  + "$ref": "#/components/responses/BackendError"
  + },
  + "550": {
  + "$ref": "#/components/responses/ResourceDoesNotExists"
  + }
  + }
  + }
  + },
  + "/api/invoices/{id}/download": {
  + "get": {
  + "security": [
  + {
  + "bearerAuth": []
  + }
  + ],
  + "description": "Download Invoice as PDF",
  + "parameters": [
  + {
  + "$ref": "#/components/parameters/invoiceID"
  + }
  + ],
  + "tags": [
  + "Billing"
  + ],
  + "responses": {
  + "200": {
  + "description": "Return invoice as PDF",
  + "content": {
  + "application/pdf": {
  + }
  + }
  + },
  + "401": {
  + "$ref": "#/components/responses/UnauthorizedError"
  + },
  + "403": {
  + "$ref": "#/components/responses/ForbiddenError"
  + },
  + "500": {
  + "$ref": "#/components/responses/BackendError"
  + },
  + "550": {
  + "$ref": "#/components/responses/ResourceDoesNotExists"
  + }
  + }
  + }
  }
  },
  "components": {
  "schema": {
  "type": "string"
  }
  + },
  + "invoiceID": {
  + "in": "path",
  + "name": "id",
  + "description": "Invoice ID",
  + "required": true,
  + "schema": {
  + "type": "string"
  + }
  }
  }
  }
  