Allow SOLR core only for a single user - solr

Question

I can't find any information on how to allow access to specific SOLR core just for a single user. I am using SOLR7. This is what I've got:
security.json
{
"authentication": {
"blockUnknown": true,
"class": "solr.BasicAuthPlugin",
"credentials": {
"test_admin": "xxx",
"infographics": "xxx",
"test_user": "xxx"
},
"": {
"v": 0
}
},
"authorization": {
"class": "solr.RuleBasedAuthorizationPlugin",
"permissions": [
{
"name": "all",
"role": "admin",
"index": 1
},
{
"name": "update",
"role": "general",
"index": 2
},
{
"name": "read",
"role": [
"general",
"infographics",
"test_user"
],
"index": 3
},
{
"name": "collection-admin-read",
"role": "general",
"index": 4
},
{
"name": "core-admin-read",
"role": "general",
"index": 5
},
{
"name": "core-specific-permission",
"collection": "test-core",
"role": "test_user",
"before": 3,
"index": 6
}
],
"user-role": {
"test_admin": [
"admin",
"general"
],
"infographics": "infographics",
"test_user": "test_user"
},
"": {
"v": 0
}
}
}
I've added a permission for collection "test-core":
{
"name": "core-specific-permission",
"collection": "test-core",
"role": "test_user",
"before": 3,
"index": 6
}
I authenticate with test_user when calling: /solr/test-core/select?q=*:*, this works fine, but it also can access other cores, for e.g.: /solr/other-core/select?q=*:*.
If I remove test_user from read permission:
{
"name": "read",
"role": [
"general",
"infographics"
],
"index": 3
},
then I am not able to query any core. Getting 403. For test_user I'd like to allow access to only this core /solr/test-core/select?q=*:* and nothing else. Any idea how can I achieve this?