Fix breakage after change to template from previous PR

api/authmethods/authenticate.go

@@ -10,7 +10,7 @@ import (
 
 // TODO: This will need to be changed when we add Auth Method API to watchtower.  We'll also need a better
 // way to handle different auth method types.
-func (c *authmethodClient) Authenticate(ctx context.Context, authMethodId, name, password string, opt ...Option) (*authtokens.AuthToken, *api.Error, error) {
+func (c *authmethodsClient) Authenticate(ctx context.Context, authMethodId, name, password string, opt ...Option) (*authtokens.AuthToken, *api.Error, error) {
 	if c.client == nil {
 		return nil, nil, fmt.Errorf("nil client in Authenticate request")
 	}

api/authmethods/authenticate_test.go

@@ -0,0 +1,36 @@
+package authmethods_test
+
+import (
+	"net/http"
+	"testing"
+
+	"github.com/hashicorp/watchtower/api/authmethods"
+	"github.com/hashicorp/watchtower/internal/servers/controller"
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func TestAuthenticate(t *testing.T) {
+	assert, require := assert.New(t), require.New(t)
+	amId := "paum_1234567890"
+	tc := controller.NewTestController(t, &controller.TestControllerOpts{
+		DisableAuthorizationFailures: true,
+		DefaultAuthMethodId:          amId,
+		DefaultUsername:              "user",
+		DefaultPassword:              "passpass",
+	})
+	defer tc.Shutdown()
+
+	client := tc.Client()
+	methods := authmethods.NewAuthMethodsClient(client)
+
+	tok, apiErr, err := methods.Authenticate(tc.Context(), amId, "user", "passpass")
+	require.NoError(err)
+	assert.Nil(apiErr)
+	assert.NotNil(tok)
+
+	_, apiErr, err = methods.Authenticate(tc.Context(), amId, "user", "wrong")
+	require.NoError(err)
+	require.NotNil(t, apiErr)
+	assert.EqualValuesf(http.StatusUnauthorized, apiErr.Status, "Expected unauthenticated, got %q", apiErr.Message)
+}