Refactor environment check into its own method

Author: bzwrk

packages/sdk/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@pipedream/sdk",
-  "version": "1.0.4",
+  "version": "1.0.5",
   "description": "Pipedream SDK",
   "main": "dist/server/index.js",
   "module": "dist/server/index.js",

packages/sdk/src/server/index.ts

@@ -353,10 +353,8 @@ export class BackendClient {
    * @param opts - The options for configuring the server client.
    */
   constructor(opts: BackendClientOpts) {
-    if (!opts.environment || !["development", "production"].includes(opts.environment)) {
-      throw new Error("Project environment is required. Supported environments are development and production.");
-    }
-    this.environment = opts.environment
+    this.ensureValidEnvironment(opts.environment)
+    this.environment = opts.environment!!
 
     this.projectId = opts.projectId;
     if (!this.projectId) {
@@ -373,6 +371,12 @@ export class BackendClient {
     this.oauthClient = this.newOauthClient(opts.credentials, this.baseApiUrl);
   }
 
+  private ensureValidEnvironment(environment?: string) {
+    if (!environment || !["development", "production"].includes(environment)) {
+      throw new Error("Project environment is required. Supported environments are development and production.");
+    }
+  }
+
   private newOauthClient(
     {
       clientId,