add follow create/delete API methods

.eslintrc.js

@@ -64,6 +64,7 @@ const memberNames = [
 	'^(streak|cumulative)_months',
 	'^live_only$',
 	'^localization_(names|descriptions)',
+	'^allow_notifications$',
 	// HTTP
 	'^Accept$'
 ];

packages/twitch/src/API/Helix/User/HelixUserApi.ts

@@ -150,6 +150,52 @@ export class HelixUserApi extends BaseApi {
 		);
 	}
 
+	/**
+	 * Creates a new follow from a user to another user.
+	 *
+	 * @param fromUser The user to create the follow for.
+	 * @param toUser The user to follow.
+	 * @param allowNotifications Whether email or push notifications are allowed to be created.
+	 *
+	 * The user `fromUser` still needs to have this enabled in their settings as well.
+	 */
+	async createFollow(
+		fromUser: UserIdResolvable,
+		toUser: UserIdResolvable,
+		allowNotifications?: boolean
+	): Promise<void> {
+		await this._client.callApi({
+			type: TwitchApiCallType.Helix,
+			url: 'users/follows',
+			method: 'POST',
+			scope: 'user:edit:follows',
+			jsonBody: {
+				from_id: extractUserId(fromUser),
+				to_id: extractUserId(toUser),
+				allow_notifications: allowNotifications
+			}
+		});
+	}
+
+	/**
+	 * Removes a follow from a user to another user.
+	 *
+	 * @param fromUser The user to remove the follow for.
+	 * @param toUser The user to unfollow.
+	 */
+	async deleteFollow(fromUser: UserIdResolvable, toUser: UserIdResolvable): Promise<void> {
+		await this._client.callApi({
+			type: TwitchApiCallType.Helix,
+			url: 'users/follows',
+			method: 'DELETE',
+			scope: 'user:edit:follows',
+			jsonBody: {
+				from_id: extractUserId(fromUser),
+				to_id: extractUserId(toUser)
+			}
+		});
+	}
+
 	private static _makeFollowsQuery(filter: HelixFollowFilter) {
 		const query: Record<string, string | undefined> = {};
 		let hasUserIdParam = false;