added 'Already have an account?' button

compforge/src/Components/Signup.react.jsx

 import React, { useState } from "react";
 import { connect } from "react-redux";
-import { Redirect } from "react-router-dom";
+import { Link, Redirect } from "react-router-dom";
 import { createUser } from "../actions";
 import { withStyles } from "@material-ui/styles";
 
@@ -120,6 +120,11 @@ const Signup = (props) => {
           Incorrect email or password.
         </Typography>
       )}
+
+      <Typography component="p" className={classes.password}>
+        <Link variant="outlined" size='small' style={{ fontSize: 10 }} color="primary" to={'/login'} > Already have an account? </Link>
+      </Typography>
+
       {createError?.isError && (
         <Typography component="p" className={classes.errorText}>
         {`${createError?.message ? createError.message : 'Error'}`}