diff --git a/client/auth.go b/client/auth.go
index 71921cf..6a9d57c 100644
--- a/client/auth.go
+++ b/client/auth.go
@@ -2,6 +2,12 @@ package client
 
 import "net/http"
 
+// AuthenticateUserOptions represents options passed to PortainerClient.AuthenticateUser()
+type AuthenticateUserOptions struct {
+	Username string
+	Password string
+}
+
 // AuthenticateUserRequest represents the body of a request to POST /auth
 type AuthenticateUserRequest struct {
 	Username string
@@ -13,10 +19,10 @@ type AuthenticateUserResponse struct {
 	Jwt string
 }
 
-func (n *portainerClientImp) AuthenticateUser() (token string, err error) {
+func (n *portainerClientImp) AuthenticateUser(options AuthenticateUserOptions) (token string, err error) {
 	reqBody := AuthenticateUserRequest{
-		Username: n.user,
-		Password: n.password,
+		Username: options.Username,
+		Password: options.Password,
 	}
 
 	respBody := AuthenticateUserResponse{}
diff --git a/client/auth_test.go b/client/auth_test.go
index 5769575..9e935f8 100644
--- a/client/auth_test.go
+++ b/client/auth_test.go
@@ -42,7 +42,10 @@ func TestClientAuthenticates(t *testing.T) {
 		Password:  "a",
 		UserAgent: "GE007",
 	})
-	token, err := customClient.AuthenticateUser()
+	token, err := customClient.AuthenticateUser(AuthenticateUserOptions{
+		Username: "admin",
+		Password: "a",
+	})
 	assert.Nil(t, err)
 	assert.Equal(t, token, "somerandomtoken")
 }
diff --git a/client/client.go b/client/client.go
index 57c8904..7e14707 100644
--- a/client/client.go
+++ b/client/client.go
@@ -23,7 +23,7 @@ type Config struct {
 // PortainerClient represents a Portainer API client
 type PortainerClient interface {
 	// AuthenticateUser a user to get an auth token
-	AuthenticateUser() (token string, err error)
+	AuthenticateUser(options AuthenticateUserOptions) (token string, err error)
 
 	// Get endpoints
 	EndpointList() ([]portainer.Endpoint, error)
@@ -155,7 +155,10 @@ func (n *portainerClientImp) doJSON(uri, method string, headers http.Header, req
 func (n *portainerClientImp) doJSONWithToken(uri, method string, headers http.Header, request interface{}, response interface{}) (err error) {
 	// Ensure there is an auth token
 	if n.token == "" {
-		n.token, err = n.AuthenticateUser()
+		n.token, err = n.AuthenticateUser(AuthenticateUserOptions{
+			Username: n.user,
+			Password: n.password,
+		})
 		if err != nil {
 			return
 		}
diff --git a/cmd/login.go b/cmd/login.go
index 49f3191..4f157fb 100644
--- a/cmd/login.go
+++ b/cmd/login.go
@@ -3,6 +3,8 @@ package cmd
 import (
 	"fmt"
 
+	"github.com/greenled/portainer-stack-utils/client"
+
 	"github.com/greenled/portainer-stack-utils/common"
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -15,14 +17,17 @@ var loginCmd = &cobra.Command{
 	Short: "Log in to a Portainer instance",
 	Run: func(cmd *cobra.Command, args []string) {
 		// Get auth token
-		client, err := common.GetDefaultClient()
+		portainerClient, err := common.GetDefaultClient()
 		common.CheckError(err)
 
 		user := viper.GetString("user")
 		logrus.WithFields(logrus.Fields{
 			"user": user,
 		}).Debug("Getting auth token")
-		authToken, err := client.AuthenticateUser()
+		authToken, err := portainerClient.AuthenticateUser(client.AuthenticateUserOptions{
+			Username: viper.GetString("user"),
+			Password: viper.GetString("password"),
+		})
 		common.CheckError(err)
 
 		if viper.GetBool("login.print") {