Improve authentication handling (#908)

lib/ConnectionPool.d.ts

@@ -26,6 +26,7 @@ import { nodeFilterFn, nodeSelectorFn } from './Transport';
 interface ConnectionPoolOptions {
   ssl?: SecureContextOptions;
   agent?: AgentOptions;
+  auth: BasicAuth | ApiKeyAuth;
   pingTimeout?: number;
   Connection: typeof Connection;
   resurrectStrategy?: string;
@@ -36,6 +37,20 @@ export interface getConnectionOptions {
   selector?: nodeSelectorFn;
 }
 
+export interface ApiKeyAuth {
+  apiKey:
+    | string
+    | {
+        id: string;
+        api_key: string;
+      }
+}
+
+export interface BasicAuth {
+  username: string;
+  password: string;
+}
+
 export interface resurrectOptions {
   now?: number;
   requestId: string;
@@ -66,6 +81,7 @@ export default class ConnectionPool {
   resurrectTimeout: number;
   resurrectTimeoutCutoff: number;
   pingTimeout: number;
+  auth: BasicAuth | ApiKeyAuth;
   Connection: typeof Connection;
   resurrectStrategy: number;
   constructor(opts?: ConnectionPoolOptions);