integration-react: link to scm auth setup docs if provider config is missing

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

packages/integration-react/src/api/ScmAuth.test.ts

@@ -238,7 +238,7 @@ describe('ScmAuth', () => {
     await expect(
       emptyMux.getCredentials({ url: 'http://example.com' }),
     ).rejects.toThrow(
-      "No authentication provider available for access to 'http://example.com'",
+      "No auth provider available for 'http://example.com', see https://backstage.io/link?scm-auth",
     );
 
     const scmAuth = ScmAuth.merge(
@@ -256,12 +256,12 @@ describe('ScmAuth', () => {
     await expect(
       scmAuth.getCredentials({ url: 'http://not.example.com' }),
     ).rejects.toThrow(
-      "No authentication provider available for access to 'http://not.example.com'",
+      "No auth provider available for 'http://not.example.com', see https://backstage.io/link?scm-auth",
     );
     await expect(
       scmAuth.getCredentials({ url: 'http://example.com:8080' }),
     ).rejects.toThrow(
-      "No authentication provider available for access to 'http://example.com:8080'",
+      "No auth provider available for 'http://example.com:8080', see https://backstage.io/link?scm-auth",
     );
   });
 });

packages/integration-react/src/api/ScmAuth.ts

@@ -53,7 +53,7 @@ class ScmAuthMux implements ScmAuthApi {
     const provider = this.#providers.find(p => p.isUrlSupported(url));
     if (!provider) {
       throw new Error(
-        `No authentication provider available for access to '${options.url}'`,
+        `No auth provider available for '${options.url}', see https://backstage.io/link?scm-auth`,
       );
     }