Fix: Bad request error when no email provider is configured

src/tools/auth0/handlers/emailProvider.ts

@@ -44,6 +44,8 @@ export default class EmailProviderHandler extends DefaultHandler {
     // HTTP DELETE on emails/provider is not supported, as this is not part of our vNext SDK.
     if (Object.keys(emailProvider).length === 0) {
       if (this.config('AUTH0_ALLOW_DELETE') === true) {
+        // If no existing provider, there is nothing to delete
+        if (!existing.name) return;
         // await this.client.emails.delete(); is not supported
         if (isEmpty(existing.credentials)) {
           delete existing.credentials;

test/tools/auth0/handlers/emailProvider.tests.js

@@ -84,6 +84,38 @@ describe('#emailProvider handler', () => {
       expect(wasUpdateCalled).to.equal(true);
     });
 
+    it('should not call update when emailProvider is empty and no existing provider exists, even when AUTH0_ALLOW_DELETE is true', async () => {
+      const AUTH0_ALLOW_DELETE = true;
+      let wasUpdateCalled = false;
+      let wasCreateCalled = false;
+      const auth0 = {
+        emails: {
+          provider: {
+            create: () => {
+              wasCreateCalled = true;
+              return Promise.resolve({});
+            },
+            update: () => {
+              wasUpdateCalled = true;
+              return Promise.resolve({});
+            },
+            get: () => Promise.resolve({}),
+          },
+        },
+      };
+
+      const handler = new emailProvider.default({
+        client: auth0,
+        config: () => AUTH0_ALLOW_DELETE,
+      });
+      const stageFn = Object.getPrototypeOf(handler).processChanges;
+
+      await stageFn.apply(handler, [{ emailProvider: {} }]);
+
+      expect(wasUpdateCalled).to.equal(false);
+      expect(wasCreateCalled).to.equal(false);
+    });
+
     it('should not delete email provider if set to empty object and if AUTH0_ALLOW_DELETE is false', async () => {
       const AUTH0_ALLOW_DELETE = false;