PLT-6763 Implement user access tokens and new roles (server-side) (#6972)

* Implement user access tokens and new roles

* Update config.json

* Add public post permission to apiv3

* Remove old comment

* Fix model unit test

* Updates to store per feedback

* Updates per feedback from CS

model/config.go

@@ -154,6 +154,7 @@ type ServiceSettings struct {
 	EnableInsecureOutgoingConnections        *bool
 	EnableMultifactorAuthentication          *bool
 	EnforceMultifactorAuthentication         *bool
+	EnableUserAccessTokens                   *bool
 	AllowCorsFrom                            *string
 	SessionLengthWebInDays                   *int
 	SessionLengthMobileInDays                *int
@@ -618,6 +619,11 @@ func (o *Config) SetDefaults() {
 		*o.ServiceSettings.EnforceMultifactorAuthentication = false
 	}
 
+	if o.ServiceSettings.EnableUserAccessTokens == nil {
+		o.ServiceSettings.EnableUserAccessTokens = new(bool)
+		*o.ServiceSettings.EnableUserAccessTokens = false
+	}
+
 	if o.PasswordSettings.MinimumLength == nil {
 		o.PasswordSettings.MinimumLength = new(int)
 		*o.PasswordSettings.MinimumLength = PASSWORD_MINIMUM_LENGTH