diff --git a/sdk/auth/credentials/access_key_credential.go b/sdk/auth/credentials/access_key_credential.go
index 45bbdbc..b691502 100644
--- a/sdk/auth/credentials/access_key_credential.go
+++ b/sdk/auth/credentials/access_key_credential.go
@@ -1,15 +1,15 @@
 package credentials
 
 type BaseCredential struct {
-	AccessKeyId     string
-	AccessKeySecret string
-	AccessKeyFrom   string
+	AccessKeyId     string `json:"access_key_id" yaml:"access_key_id"`
+	AccessKeySecret string `json:"access_key_secret" yaml:"access_key_secret"`
+	AccessKeyFrom   string `json:"access_key_from" yaml:"access_key_from"`
 }
 
 type AccessKeyCredential struct {
-	AccessKeyId     string
-	AccessKeySecret string
-	AccessKeyFrom   string
+	AccessKeyId     string `json:"access_key_id" yaml:"access_key_id"`
+	AccessKeySecret string `json:"access_key_secret" yaml:"access_key_secret"`
+	AccessKeyFrom   string `json:"access_key_from" yaml:"access_key_from"`
 }
 
 func (baseCred *BaseCredential) ToAccessKeyCredential() *AccessKeyCredential {
diff --git a/sdk/auth/credentials/sts_token_credential.go b/sdk/auth/credentials/sts_token_credential.go
index ef5847c..0fac16b 100644
--- a/sdk/auth/credentials/sts_token_credential.go
+++ b/sdk/auth/credentials/sts_token_credential.go
@@ -1,9 +1,9 @@
 package credentials
 
 type StdTokenCredential struct {
-	AccessKeyId     string
-	AccessKeySecret string
-	AccessKeyFrom   string
+	AccessKeyId     string `json:"access_key_id" yaml:"access_key_id"`
+	AccessKeySecret string `json:"access_key_secret" yaml:"access_key_secret"`
+	AccessKeyFrom   string `json:"access_key_from" yaml:"access_key_from"`
 }
 
 func NewStsTokenCredential(accessKeyId, accessKeySecret, accessFrom string) *StdTokenCredential {