You can extend your user model and set permissions for your custom model like this:
{
"name": "CustomUser",
"base": "User",
"idInjection": true,
"properties": {},
"validations": [],
"relations": {},
"acls": [
{
"accessType": "READ",
"principalType": "ROLE",
"principalId": "$unauthenticated",
"permission": "ALLOW"
},
{
"accessType": "READ",
"principalType": "ROLE",
"principalId": "$authenticated",
"permission": "ALLOW"
},
{
"accessType": "*",
"principalType": "ROLE",
"principalId": "$owner",
"permission": "ALLOW"
}
],
"methods": []
}
However I would NEVER recommend you doing this.