Cherry pick v1.7 into master

vendor/github.com/smueller18/goinwx/account.go

@@ -0,0 +1,54 @@
+package goinwx
+
+const (
+	methodAccountLogin  = "account.login"
+	methodAccountLogout = "account.logout"
+	methodAccountLock   = "account.lock"
+	methodAccountUnlock = "account.unlock"
+)
+
+type AccountService interface {
+	Login() error
+	Logout() error
+	Lock() error
+	Unlock(tan string) error
+}
+
+type AccountServiceOp struct {
+	client *Client
+}
+
+var _ AccountService = &AccountServiceOp{}
+
+func (s *AccountServiceOp) Login() error {
+	req := s.client.NewRequest(methodAccountLogin, map[string]interface{}{
+		"user": s.client.Username,
+		"pass": s.client.Password,
+	})
+
+	_, err := s.client.Do(*req)
+	return err
+}
+
+func (s *AccountServiceOp) Logout() error {
+	req := s.client.NewRequest(methodAccountLogout, nil)
+
+	_, err := s.client.Do(*req)
+	return err
+}
+
+func (s *AccountServiceOp) Lock() error {
+	req := s.client.NewRequest(methodAccountLock, nil)
+
+	_, err := s.client.Do(*req)
+	return err
+}
+
+func (s *AccountServiceOp) Unlock(tan string) error {
+	req := s.client.NewRequest(methodAccountUnlock, map[string]interface{}{
+		"tan": tan,
+	})
+
+	_, err := s.client.Do(*req)
+	return err
+}