Error: Compile Error: sObject type 'Registration__c' is not supported. If you are attempting to use a custom object, be sure to append the '__c' after the entity name. Please reference your WSDL or the describe call for the appropriate names. at line 18 column 18





public class LoginAuthentication {
  public String username  {get;set;}
  public String password {get;set;}
 
  public pageReference loginCheck() {
    List<Registration__c> regLst = new List<Registration__c>();
    pageReference pr;
    if(username == '') {
      ApexPages.addMessage(new ApexPages.Message(
      ApexPages.severity.Error,'Please Enter Username.'));
    }
    else {
      if(password == '') {
        ApexPages.addMessage(new ApexPages.Message(
        ApexPages.severity.Error,'Please Enter Password.'));
      }
      else {
        regLst = [select id, username__c, password__c from Registration__c
        where username__c =: username];
        if(regLst.size() == 0) {
          ApexPages.addMessage(new ApexPages.Message(
          ApexPages.severity.Error,'Username does not exist'));
        }
        else {
          if(regLst[0].password__c != password) {
            ApexPages.addMessage(new ApexPages.Message(
            ApexPages.severity.Error,'Password does not exist'));
          }
          else {
            pr = new pageReference('/apex/Welcome');
          }
        }
      }
    }
    return pr;
  }
}