How to call invocable method (@InvocableMethod) from APEX Controller to convert automatic lead to Account, Contact and Opportunity Uses of Flow Builder/Flow Action in Salesforce | convert automatic lead to Account, Contact and Opportunity through apex class and flow action in Salesforce

   public class leadConvertAutoCtrl {

   @InvocableMethod   

    public static void LeadAssign(List<Id> LeadIds)  

    {

        List<String> conStr = NEW List<String>();

        List<Contact> conList = [SELECT Id, FirstName, LastName, Email, Phone FROM Contact WHERE Phone !=NULL];

        FOR(Contact con:conList){

            conStr.add(con.Phone);

        }

        system.debug('conStr#__11 ' + conStr);

       Set<String> phStr = NEW Set<String>(); 

        List<Lead> leadObjList = [SELECT Id, FirstName, LastName, Phone FROM Lead WHERE Id=:LeadIds];

        FOR(Lead d1:leadObjList){

            phStr.add(d1.Phone);

            IF(conStr.contains(d1.Phone)){

                system.debug('do not allow duplicate phone');

                //d1.addError('do not allow duplicate phone');

            }ELSE{

                /*Start lead convert*/ 

        LeadStatus CLeadStatus= [SELECT Id, MasterLabel FROM LeadStatus WHERE IsConverted=TRUE LIMIT 1];    

        List<DATABASE.LeadConvert> MassLeadconvert = NEW List<DATABASE.LeadConvert>();    

        FOR(id currentlead: LeadIds){                    

            DATABASE.LeadConvert Leadconvert = NEW DATABASE.LeadConvert();    

            Leadconvert.setLeadId(currentlead);                               

            Leadconvert.setConvertedStatus(CLeadStatus.MasterLabel);             

            Leadconvert.setDoNotCreateOpportunity(FALSE); 

            MassLeadconvert.add(Leadconvert); 

        }        

        IF (!MassLeadconvert.isEmpty())

        {            

            List<DATABASE.LeadConvertResult> lcr = DATABASE.convertLead(MassLeadconvert);       

        }    

      /*End lead convert*/

            }

        }

        system.debug('phStr ' + phStr);

    } 

}