Add email to login command when given

plugin.go

@@ -123,6 +123,9 @@ const dockerExe = "/usr/local/bin/docker"
 
 // helper function to create the docker login command.
 func commandLogin(login Login) *exec.Cmd {
+	if p.Login.Email != "" {
+		return commandLoginEmail(p.Login)
+	}
 	return exec.Command(
 		dockerExe, "login",
 		"-u", login.Username,
@@ -131,6 +134,16 @@ func commandLogin(login Login) *exec.Cmd {
 	)
 }
 
+func commandLoginEmail(p.Login) *exec.Cmd {
+	return exec.Command(
+		dockerExe, "login",
+		"-u", login.Username,
+		"-p", login.Password,
+		"-e", login.Email,
+		login.Registry,
+	)
+}
+
 // helper function to create the docker info command.
 func commandVersion() *exec.Cmd {
 	return exec.Command(dockerExe, "version")