fix(rdb): prevent crash when updating user without password (scaleway#4690)

Author: jremy42

internal/namespaces/rdb/v1/custom_user.go

@@ -2,6 +2,7 @@ package rdb
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"reflect"
 
@@ -183,6 +184,12 @@ func userUpdateBuilder(c *core.Command) *core.Command {
 			fmt.Printf("\n")
 		}
 
+		if !customRequest.GeneratePassword && customRequest.Password == nil {
+			return nil, errors.New(
+				"you must provide a password when generate-password is set to false",
+			)
+		}
+
 		user, err := api.UpdateUser(updateUserRequest)
 		if err != nil {
 			return nil, err