feat(REST): enable setting default authPrefix (#7853)

packages/rest/src/lib/REST.ts

@@ -29,6 +29,12 @@ export interface RESTOptions {
 	 * @default 'https://discord.com/api'
 	 */
 	api: string;
+	/**
+	 * The authorization prefix to use for requests, useful if you want to use
+	 * bearer tokens
+	 * @default 'Bot'
+	 */
+	authPrefix: 'Bot' | 'Bearer';
 	/**
 	 * The cdn path
 	 * @default 'https://cdn.discordapp.com'

packages/rest/src/lib/RequestManager.ts

@@ -351,7 +351,7 @@ export class RequestManager extends EventEmitter {
 				throw new Error('Expected token to be set for this request, but none was present');
 			}
 
-			headers.Authorization = `${request.authPrefix ?? 'Bot'} ${this.#token}`;
+			headers.Authorization = `${request.authPrefix ?? this.options.authPrefix} ${this.#token}`;
 		}
 
 		// If a reason was set, set it's appropriate header

packages/rest/src/lib/utils/constants.ts

@@ -9,6 +9,7 @@ export const DefaultUserAgent = `DiscordBot (${Package.homepage}, ${Package.vers
 export const DefaultRestOptions: Required<RESTOptions> = {
 	agent: {},
 	api: 'https://discord.com/api',
+	authPrefix: 'Bot',
 	cdn: 'https://cdn.discordapp.com',
 	headers: {},
 	invalidRequestWarningInterval: 0,