feat: add session token

server/crypto/b64.go

@@ -0,0 +1,17 @@
+package crypto
+
+import "encoding/base64"
+
+// EncryptB64 encrypts data into base64 string
+func EncryptB64(text string) string {
+	return base64.StdEncoding.EncodeToString([]byte(text))
+}
+
+// DecryptB64 decrypts from base64 string to readable string
+func DecryptB64(s string) (string, error) {
+	data, err := base64.StdEncoding.DecodeString(s)
+	if err != nil {
+		return "", err
+	}
+	return string(data), nil
+}