add error when client is not configured in provider

internal/resources/cloudprovider/resources.go

@@ -32,6 +32,15 @@ func withClientForResource(req resource.ConfigureRequest, resp *resource.Configu
 		return nil, fmt.Errorf("unexpected Resource Configure Type: %T, expected *common.Client", req.ProviderData)
 	}
 
+	if client.CloudProviderAPI == nil {
+		resp.Diagnostics.AddError(
+			"The Grafana Provider is missing a configuration for the Cloud Provider API.",
+			"Please ensure that cloud_provider_url and cloud_provider_access_token are set in the provider configuration.",
+		)
+
+		return nil, fmt.Errorf("CloudProviderAPI is nil")
+	}
+
 	return client.CloudProviderAPI, nil
 }
 
@@ -47,5 +56,14 @@ func withClientForDataSource(req datasource.ConfigureRequest, resp *datasource.C
 		return nil, fmt.Errorf("unexpected DataSource Configure Type: %T, expected *common.Client", req.ProviderData)
 	}
 
+	if client.CloudProviderAPI == nil {
+		resp.Diagnostics.AddError(
+			"The Grafana Provider is missing a configuration for the Cloud Provider API.",
+			"Please ensure that cloud_provider_url and cloud_provider_access_token are set in the provider configuration.",
+		)
+
+		return nil, fmt.Errorf("CloudProviderAPI is nil")
+	}
+
 	return client.CloudProviderAPI, nil
 }

pkg/provider/configure_clients.go

@@ -59,7 +59,7 @@ func CreateClients(providerConfig ProviderConfig) (*common.Client, error) {
 		onCallClient.UserAgent = providerConfig.UserAgent.ValueString()
 		c.OnCallClient = onCallClient
 	}
-	if !providerConfig.CloudProviderURL.IsNull() && !providerConfig.CloudProviderAccessToken.IsNull() {
+	if !providerConfig.CloudProviderAccessToken.IsNull() {
 		if err := createCloudProviderClient(c, providerConfig); err != nil {
 			return nil, err
 		}