refactor: build cobra commands with constructors

cmd/login.go

@@ -7,31 +7,29 @@ import (
 	"github.com/spf13/cobra"
 )
 
-var loginCmd = &cobra.Command{
-	Use:   "login",
-	Short: "Log in to Deezer with your email and password",
-	Args:  cobra.NoArgs,
-	RunE: func(cmd *cobra.Command, args []string) error {
-		if err := auth.CheckGatewayEnv(); err != nil {
-			return err
-		}
+func newLoginCmd() *cobra.Command {
+	return &cobra.Command{
+		Use:   "login",
+		Short: "Log in to Deezer with your email and password",
+		Args:  cobra.NoArgs,
+		RunE: func(cmd *cobra.Command, args []string) error {
+			if err := auth.CheckGatewayEnv(); err != nil {
+				return err
+			}
 
-		email, password, err := auth.PromptCredentials()
-		if err != nil {
-			return err
-		}
+			email, password, err := auth.PromptCredentials()
+			if err != nil {
+				return err
+			}
 
-		_, username, err := auth.Login(cmd.Context(), email, password)
-		if err != nil {
-			return err
-		}
+			_, username, err := auth.Login(cmd.Context(), email, password)
+			if err != nil {
+				return err
+			}
 
-		fmt.Printf("Successfully logged in as %s.\n", username)
+			fmt.Printf("Successfully logged in as %s.\n", username)
 
-		return nil
-	},
-}
-
-func init() {
-	RootCmd.AddCommand(loginCmd)
+			return nil
+		},
+	}
 }