If you need to share access to the Kubernetes cluster with other users, it is recommended to create separate ServiceAccounts with the required Roles and RoleBindings. Such a flow helps to manage allowed actions manually (e.g. to create namespaces, deployments, services, ingresses, etc).
Kubernetes Cluster: Access Control
Note: Kubernetes RBAC system is not aligned with Jelastic accounts. Any user with SSH access to the master node can utilize the pre-configured kubectl tool with its cluster-admin role. Due to this specific, environment sharing over Jelastic PaaS functionality may expose sensitive information.