MakeTableView not working with Secured Service

[kapalczynski]

I have a bit of code that is making a Table View and then updating a field based on a WHERE clause.

as Long as my Service is PUBLIC it works fine... if I lock down to Organization or Owner it does not work.  I am using a TOKEN but that still does not work... 

I keep getting an error that the table view does not exist which is telling me the arcpy.management.MakeTableView is not working on the secured service.

Why does this not work on a Secured Service with a proper TOKEN

def updateDataFlagValuesToImported():
    gis2 = GIS("https://**unspecified**.com/portal", "username", "********")
    currenttoken2 = gis2._con.token
    print(currenttoken2)
    arcpy.env.overwriteOutput = True
    updateFlagURL = r"https://**unspecified**.com/env/rest/services/**unspecified**/FeatureServer/0?token=" + currenttoken2
    print(updateFlagURL)
    whereClause = "FLAG IS NULL"
    tableView = "fLyr"
    try:
        arcpy.management.MakeTableView(updateFlagURL, tableView, whereClause)
    except Exception:
        # Handle errors accordingly...this is generic
        tb = sys.exc_info()[2]
        tb_info = traceback.format_tb(tb)[0]
        pymsg = 'PYTHON ERRORS:\n\tTraceback info:\t{tb_info}\n\tError Info:\t{str(sys.exc_info()[1])}\n'
        msgs = 'ArcPy ERRORS:\t{arcpy.GetMessages(2)}\n'
        print(pymsg)
        print(msgs)
        
    arcpy.management.CalculateField(
        in_table= "fLyr",
        field="FLAG",
        expression="'Imported'",
        expression_type="PYTHON3",
        code_block="",
        field_type="TEXT",
        enforce_domains="NO_ENFORCE_DOMAINS"
    )

[kapalczynski · Accepted solution]

Think I just got it... I added the line to sign into Portal and I think its working... 
I also removed the TOKEN which was not needed on the Service... the portal login was enough

portalURL = 'https://**unspecified**.com/portal'
username = 'username'
password = '********'

arcpy.SignInToPortal(portalURL, username, password)

def updateDataFlagValuesToImported():
    updateFlagURL = r"https://**unspecified**.com/env/rest/services/**unspecified**/FeatureServer/0"
    whereClause = "FLAG IS NULL"
    tableView = "fLyr"

    arcpy.management.MakeTableView(updateFlagURL, tableView, whereClause)

    arcpy.management.CalculateField(
        in_table= "fLyr",
        field="FLAG",
        expression="'Imported'",
        expression_type="PYTHON3",
        code_block="",
        field_type="TEXT",
        enforce_domains="NO_ENFORCE_DOMAINS"
    )