[Quickie]

pawn Код:

if(strlen(inputtext) < 5 || strlen(inputtext) > 60) return ShowPlayerDialog(playerid, 6, DIALOG_STYLE_INPUT,"Register:", "Error: Your Email length Should Be Between 5 To 60 characters. \nWrite your email address.\nExemplu: my_email@yahoo.com","OK", ""); 
new INI:File = INI_Open(/*Your User Path Here To Open*/);
INI_SetTag(File,"data");
INI_WriteString(File,"Email",inputtext);
INI_Close(File);

On load user stats

pawn Код:

INI_String("Email",PlayerInfo[playerid][pEmail],sizeof(PlayerInfo[playerid][pEmail]);