chore: add a warning if amplify configure has not been called (#14424)

* chore: add a warning if amplify configure has not been called

* chore: adjust package size limits

Author: soberm

packages/aws-amplify/package.json

@@ -307,7 +307,7 @@
 			"name": "[Analytics] record (Pinpoint)",
 			"path": "./dist/esm/analytics/index.mjs",
 			"import": "{ record }",
-			"limit": "17.92 kB"
+			"limit": "17.98 kB"
 		},
 		{
 			"name": "[Analytics] record (Kinesis)",
@@ -331,7 +331,7 @@
 			"name": "[Analytics] identifyUser (Pinpoint)",
 			"path": "./dist/esm/analytics/index.mjs",
 			"import": "{ identifyUser }",
-			"limit": "16.40 kB"
+			"limit": "16.41 kB"
 		},
 		{
 			"name": "[Analytics] enable",
@@ -373,7 +373,7 @@
 			"name": "[Auth] confirmResetPassword (Cognito)",
 			"path": "./dist/esm/auth/index.mjs",
 			"import": "{ confirmResetPassword }",
-			"limit": "13.25 kB"
+			"limit": "13.26 kB"
 		},
 		{
 			"name": "[Auth] signIn (Cognito)",
@@ -427,7 +427,7 @@
 			"name": "[Auth] setUpTOTP (Cognito)",
 			"path": "./dist/esm/auth/index.mjs",
 			"import": "{ setUpTOTP }",
-			"limit": "13.89 kB"
+			"limit": "13.91 kB"
 		},
 		{
 			"name": "[Auth] updateUserAttributes (Cognito)",
@@ -493,13 +493,13 @@
 			"name": "[Storage] copy (S3)",
 			"path": "./dist/esm/storage/index.mjs",
 			"import": "{ copy }",
-			"limit": "16.90 kB"
+			"limit": "16.91 kB"
 		},
 		{
 			"name": "[Storage] downloadData (S3)",
 			"path": "./dist/esm/storage/index.mjs",
 			"import": "{ downloadData }",
-			"limit": "17.26 kB"
+			"limit": "17.28 kB"
 		},
 		{
 			"name": "[Storage] getProperties (S3)",
@@ -511,7 +511,7 @@
 			"name": "[Storage] getUrl (S3)",
 			"path": "./dist/esm/storage/index.mjs",
 			"import": "{ getUrl }",
-			"limit": "17.75 kB"
+			"limit": "17.77 kB"
 		},
 		{
 			"name": "[Storage] list (S3)",

packages/core/src/singleton/Amplify.ts

@@ -19,6 +19,8 @@ export class AmplifyClass {
 		| ((authConfig: AuthConfig['Cognito']) => void)
 		| undefined = undefined;
 
+	private isConfigured = false;
+
 	resourcesConfig: ResourcesConfig;
 	libraryOptions: LibraryOptions;
 
@@ -76,6 +78,7 @@ export class AmplifyClass {
 		);
 
 		this.notifyOAuthListener();
+		this.isConfigured = true;
 	}
 
 	/**
@@ -84,6 +87,13 @@ export class AmplifyClass {
 	 * @returns Returns the immutable back-end resource configuration.
 	 */
 	getConfig(): Readonly<ResourcesConfig> {
+		if (!this.isConfigured) {
+			// eslint-disable-next-line no-console
+			console.warn(
+				`Amplify has not been configured. Please call Amplify.configure() before using this service.`,
+			);
+		}
+
 		return this.resourcesConfig;
 	}