mv acme config setup into own func

server/certificates/acme_account.go

@@ -0,0 +1,27 @@
+package certificates
+
+import (
+	"crypto"
+
+	"github.com/go-acme/lego/v4/registration"
+)
+
+type AcmeAccount struct {
+	Email        string
+	Registration *registration.Resource
+	Key          crypto.PrivateKey `json:"-"`
+	KeyPEM       string            `json:"Key"`
+}
+
+// make sure AcmeAccount match User interface
+var _ registration.User = &AcmeAccount{}
+
+func (u *AcmeAccount) GetEmail() string {
+	return u.Email
+}
+func (u AcmeAccount) GetRegistration() *registration.Resource {
+	return u.Registration
+}
+func (u *AcmeAccount) GetPrivateKey() crypto.PrivateKey {
+	return u.Key
+}