Unable to log in kibana with the created user

[JasonJay]

I followed the doc to create a new user: configuring-security
and I performed the following two requests

curl -XPOST -u elastic 'localhost:9200/_security/role/events_admin' -H "Content-Type: application/json" -d '{
 "indices" : [
{
  "names" : [ "events*" ],
  "privileges" : [ "all" ]
},
{
  "names" : [ ".kibana*" ],
  "privileges" : [ "manage", "read", "index" ]
}
]
}'

curl -XPOST -u elastic 'localhost:9200/_security/user/johndoe' -H "Content-Type: application/json" -d '
{
"password" : "userpassword",
"full_name" : "John Doe",
"email" : "john.doe@anony.mous",
"roles" : [ "events_admin" ]
}'

then I use it to login kibana，kibana display json info

 {
    statusCode: 403,
    error: "Forbidden",
    message: "Forbidden"
}

my question is why I could not log in kibana with this new user， What have I done less?

[JasonJay]

Similarly，I create another user by kibana interface

but the same error occured