Add method to see if the game can start

src/utils/Game.ts

@@ -47,6 +47,20 @@ export class Game {
 		this.player_len--;
 	};
 
+	public start_error(): string {
+		/**
+		 * This function gives the error as to why the game is not able to
+		 * start to be able to send it to the client. If the return string is
+		 * empty that means that the game is able to be started.
+		 *
+		 * @return The error that prevents the game from starting.
+		 */
+		if (this.player_len <= 4) {
+			return `Cannot start game with less than 4 players.`;
+		};
+		return ``;
+	};
+
 	public toString(): string {
 		let player_count = Object.keys(this._players).length;
 		return `Game(code=${this.code},players=${player_count})`;