Update docs for SC secret (IBM-Cloud#5241)

* SC addition

* SC addition

* SC addition

* update function updated

* SC unit tests added

* SC unit tests added

* d

* tests fixes

* tests fixes

* update sdk

* .secrets.baseline update

* .secrets.baseline update

* .secrets.baseline update

* Update sm_service_credentials_secret_metadata.html.markdown

* bugs fixes

* bugs fixes

* bugs fixes

* docs bugs fixes

* preferred_chain added for public cert lets encrypt configuration

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* preferred chain docs update

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* support for creating secret version for username password & version_custom_metadata for all

* fix public cert bug

* update docs

---------

Co-authored-by: Yonathan-Yellin <yonathan.yellin@ibm.com>
Co-authored-by: Avi Ribchinsky <avir@il.ibm.com>
Co-authored-by: Tatyana <tatyanab@il.ibm.com>
Co-authored-by: Idan Adar <iadar@il.ibm.com>

website/docs/r/sm_service_credentials_secret.html.markdown

@@ -28,7 +28,7 @@ resource "ibm_sm_service_credentials_secret" "sm_service_credentials_secret" {
   secret_group_id = ibm_sm_secret_group.sm_secret_group.secret_group_id
   source_service {
 	instance {
-		crn = "crn:v1:staging:public:cloud-object-storage:global:a/111f5fb10986423e9saa8512f1db7e65:111133c8-49ea-41xe-8c40-122038246f5b::"
+		crn = "crn:v1:bluemix:public:cloud-object-storage:global:a/111f5fb10986423e9saa8512f1db7e65:111133c8-49ea-41xe-8c40-122038246f5b::"
 	}
 	role {
 		crn = "crn:v1:bluemix:public:iam::::serviceRole:Writer"
@@ -39,6 +39,35 @@ resource "ibm_sm_service_credentials_secret" "sm_service_credentials_secret" {
 }
 ```
 
+## Example Usage with existing service ID
+
+```hcl
+resource "ibm_sm_service_credentials_secret" "sm_service_credentials_secret" {
+  instance_id   = ibm_resource_instance.sm_instance.guid
+  region        = "us-south"
+  name 			= "secret-name"
+  custom_metadata = {"key":"value"}
+  description = "Extended description for this secret."
+  labels = ["my-label"]
+  rotation {
+		auto_rotate = true
+		interval = 1
+		unit = "day"
+  }
+  secret_group_id = ibm_sm_secret_group.sm_secret_group.secret_group_id
+  source_service {
+	instance {
+		crn = "crn:v1:bluemix:public:cloud-object-storage:global:a/111f5fb10986423e9saa8512f1db7e65:111133c8-49ea-41xe-8c40-122038246f5b::"
+	}
+	role {
+		crn = "crn:v1:bluemix:public:iam::::serviceRole:Writer"
+	}
+	parameters = {"HMAC": true, "serviceid_crn": "crn:v1:bluemix:public:iam-identity::a/22222f3c34444ff155555d15ca616946::serviceid:ServiceId-1234f56e-1d23-45e6-123c-cfb456b87fyb"}
+  }
+  ttl = "1800"
+}
+```
+
 ### Example to access resource credentials using credentials attribute:
 
 ```terraform
@@ -48,7 +77,7 @@ resource "ibm_sm_service_credentials_secret" "sm_service_credentials_secret" {
   name 			= "secret-name"
   source_service {
 	instance {
-		crn = "crn:v1:staging:public:cloud-object-storage:global:a/111f5fb10986423e9saa8512f1db7e65:111133c8-49ea-41xe-8c40-122038246f5b::"
+		crn = "crn:v1:bluemix:public:cloud-object-storage:global:a/111f5fb10986423e9saa8512f1db7e65:111133c8-49ea-41xe-8c40-122038246f5b::"
 	}
 	role {
 		crn = "crn:v1:bluemix:public:iam::::serviceRole:Writer"