Class TFDConnection not found

Question

I am trying to create a simple Rad Server with delphi. I started by adding a Datamodule for database connection. It does connect and work, Created a singleton so other data modules could use the connection. When I run and the connection is called, I get error TFDConnection not found.

This is my db connection module

    unit databaseConnection;
 
interface
 
uses
  System.SysUtils, System.Classes, System.JSON,
  EMS.Services, EMS.ResourceAPI, EMS.ResourceTypes, FireDAC.Stan.Intf,
  FireDAC.Stan.Option, FireDAC.Stan.Error, FireDAC.UI.Intf, FireDAC.Phys.Intf,
  FireDAC.Stan.Def, FireDAC.Stan.Pool, FireDAC.Stan.Async, FireDAC.Phys,
  FireDAC.Phys.MySQL, FireDAC.Phys.MySQLDef, FireDAC.ConsoleUI.Wait,
  FireDAC.Phys.MSSQLDef, FireDAC.Phys.ODBCBase, FireDAC.Phys.MSSQL, Data.DB,
  FireDAC.Comp.Client;
 
type
  [ResourceName('DatabaseConnection')]
  TDatabaseConnectionResource1 = class(TDataModule)
  private
    class var FInstance: TDatabaseConnectionResource1; // Singleton instance
  public
    FDConnection1: TFDConnection;
    FDPhysMSSQLDriverLink1: TFDPhysMSSQLDriverLink;
    class function Instance: TDatabaseConnectionResource1;
    procedure AfterConstruction; override;
    procedure BeforeDestruction; override;
 
  published
  end;
 
implementation
 
{%CLASSGROUP 'System.Classes.TPersistent'}
 
{$R *.dfm}
 
{ TDatabaseConnectionResource1 }
 
class function TDatabaseConnectionResource1.Instance: TDatabaseConnectionResource1;
begin
  if FInstance = nil then
    FInstance := TDatabaseConnectionResource1.Create(nil);
  Result := FInstance;
end;
 
procedure TDatabaseConnectionResource1.AfterConstruction;
begin
  inherited;
  // Initialization code if needed
end;
 
procedure TDatabaseConnectionResource1.BeforeDestruction;
begin
  // Clean-up code if needed
  inherited;
end;
 
procedure Register;
begin
  RegisterResource(TypeInfo(TDatabaseConnectionResource1));
end;
 
initialization
  Register;

Now in the next module I have added the unit to the uses

uses ... databaseConnection;

Now I try to connect connection to query below.

// Initialize query
    LQuery := TFDQuery.Create(nil);
    try
      LQuery.Connection := TDatabaseConnectionResource1.Instance.FDConnection1;
 
      // Insert new user
      LSQL := 'INSERT INTO Teams (Company, Status, admin_rank, phone) VALUES (:Company, :Status, :Admin_Rank, :Phone)';
      LQuery.SQL.Text := LSQL;
      LQuery.ParamByName('Company').AsString := LCompany;
      LQuery.ParamByName('Status').AsString := LStatus;
      LQuery.ParamByName('Admin_Rank').AsInteger := Ladminrank;
      LQuery.ParamByName('Phone').AsString := LPhone;
      LQuery.ExecSQL;
 
      AResponse.StatusCode := 200; // OK
      AResponse.Body.SetValue(TJSONString.Create('Team created successfully'), True);
    finally
      LQuery.Free;
    end;
  finally
    LJSON.Free;
  end
  else
  begin
    AResponse.RaiseBadRequest('Invalid JSON');
  end;

everything compiles and builds, but can not seem to find why its giving this error? Am I missing something?