while testing the role based access in the Alibaba container service it's throwing with me an error "pods is forbidden: User "user1" cannot list pods in the namespace "stage"" this is RBAC issue, which i'm not able to figure it where i'm heading it wrong

The RoleBinding Definition

root@kube-master:# kubectl describe rolebinding stage-role-binding  -n stage
Name:         stage-role-binding
Labels:       <none>
Annotations:  <none>
Role:
  Kind:  Role
  Name:  staging
Subjects:
  Kind  Name   Namespace
  ----  ----   ---------
  User  user2  

The Role Definition

root@kube-master:# kubectl describe role -n stage
Name:         staging
Labels:       <none>
Annotations:  <none>
PolicyRule:
  Resources               Non-Resource URLs  Resource Names  Verbs
  ---------               -----------------  --------------  -----
  deployments             []                 []              [get list watch create update patch delete]
  pods                    []                 []              [get list watch create update patch delete]
  replicasets             []                 []              [get list watch create update patch delete]
  deployments.apps        []                 []              [get list watch create update patch delete]
  pods.apps               []                 []              [get list watch create update patch delete]
  replicasets.apps        []                 []              [get list watch create update patch delete]
  deployments.extensions  []                 []              [get list watch create update patch delete]
  pods.extensions         []                 []              [get list watch create update patch delete]
  replicasets.extensions  []                 []              [get list watch create update patch delete]

One pod is running well in the stage namespace

root@kube-master:# kubectl get pods -n stage 
NAME      READY     STATUS    RESTARTS   AGE
busybox   1/1       Running   0          10m

Defining context

root@kube-master:# kubectl config set-context stage --cluster=kubernetes --namespace=stage --user=user2
Context "stage" modified.

Testing RBAC

root@kube-master:/home/ansible# kubectl --context=stage get pods
No resources found.
Error from server (Forbidden): pods is forbidden: User "user1" cannot list pods in the namespace "stage"

Not sure from where user1

is coming and throwing the RBAC Error

There is only context is set for user2

root@kube-master:# kubectl config get-contexts
CURRENT   NAME                          CLUSTER      AUTHINFO           NAMESPACE
*         kubernetes-admin@kubernetes   kubernetes   kubernetes-admin   
          stage                         kubernetes   user2              stage

This is how i created the user

openssl genrsa -out user2.key 2048
openssl req -new -key user2.key -out user2.csr -subj "/CN=user1/O=8gwifi.org"
openssl x509 -req -in user2.csr -CA /etc/kubernetes/pki/ca.crt -CAkey /etc/kubernetes/pki/ca.key -CAcreateserial -out user2.crt -days 500

kubectl config set-credentials user2 --client-certificate=user2.crt --client-key=user2.key
kubectl config set-context stage --cluster=kubernetes --namespace=stage --user=user2