Fails to open PR's description in some repos on GitHub Enterprise (reviewers name parsing?) (#6902)

Fixes #6736

Author: alexr00

src/github/graphql.ts

@@ -81,6 +81,10 @@ export interface ReactionGroup {
 	};
 }
 
+export interface Node {
+	id: string;
+}
+
 export interface Actor {
 	__typename: string;
 	id: string;
@@ -94,11 +98,11 @@ export interface Account extends Actor {
 	email: string;
 }
 
-export function isAccount(x: Actor | Team | undefined | null): x is Account {
+export function isAccount(x: Actor | Team | Node | undefined | null): x is Account {
 	return !!x && 'name' in x && 'email' in x;
 }
 
-export function isTeam(x: Actor | Team | undefined | null): x is Team {
+export function isTeam(x: Actor | Team | Node | undefined | null): x is Team {
 	return !!x && 'slug' in x;
 }
 
@@ -258,7 +262,7 @@ export interface GetReviewRequestsResponse {
 		pullRequest: {
 			reviewRequests: {
 				nodes: {
-					requestedReviewer: Actor | Account | Team | null;
+					requestedReviewer: Actor | Account | Team | Node | null;
 				}[];
 			};
 		};

src/github/utils.ts

@@ -645,7 +645,7 @@ export function parseGraphQLReviewers(data: GraphQL.GetReviewRequestsResponse, r
 		if (GraphQL.isTeam(reviewer.requestedReviewer)) {
 			const team: ITeam = parseTeam(reviewer.requestedReviewer, repository);
 			reviewers.push(team);
-		} else {
+		} else if (GraphQL.isAccount(reviewer.requestedReviewer)) {
 			const account: IAccount = parseAccount(reviewer.requestedReviewer, repository);
 			reviewers.push(account);
 		}