Update README.md
A portal & RESTful API for Casbin: https://cloud.casbin.org/
/tenants: Get all tenants, each tenant has an ID and a name./tenants/<TENANT_NAME>: Get the metadata.json for a tenant <TENANT_NAME>./tenants/<TENANT_NAME>/policies/<POLICY_NAME>: Get the xxx.csv policy for a tenant <TENANT_NAME>./tenants/<TENANT_NAME>: Set the metadata.json for a tenant <TENANT_NAME>./tenants/<TENANT_NAME>/policies/<POLICY_NAME>: Set the <POLICY_NAME>.json for a tenant <TENANT_NAME>./tenants/<TENANT_NAME>/users: Get all users for a tenant <TENANT_NAME>./tenants/<TENANT_NAME>/users/<USER_NAME>/commands: Get all commands that can be run by the user <USER_NAME> of tenant <TENANT_NAME>./tenants/<TENANT_NAME>/users/<USER_NAME>/commands/<COMMAND>: Run command <COMMAND> as the user <USER_NAME> of tenant <TENANT_NAME>./reset: Reset all data to the initial state.