diff --git a/static/style.css b/static/style.css
index 40c9cd6..73e0248 100644
--- a/static/style.css
+++ b/static/style.css
@@ -37,7 +37,7 @@ input {
 	margin:20px;
 	font-size:1.2em;
 }
-button {
+button, .button {
 	font-size:1em;
 	text-transform: uppercase;
 	color:#2b90d9;
@@ -47,8 +47,9 @@ button {
 	padding:10px 25px;
 	transition:0.2s all ease-in;
 	cursor: pointer;
+	text-decoration:none;
 }
-button:hover{
+button:hover, .button:hover{
 	background-color:#2b90d9;
 	color:white;
 }
diff --git a/templates/landing_page.html b/templates/landing_page.html
index ce07f32..b011e76 100644
--- a/templates/landing_page.html
+++ b/templates/landing_page.html
@@ -16,8 +16,10 @@
 <form onsubmit='cont(); return false'>
 	<label for='instance'>Instance URL</label><br />
 	<input name='instance' placeholder='mastodon.social' id='instance-input' /><br />
-	<button class='loading'>Continue</button>
+	<button class='loading'>Sign Up</button>
 </form>
+<br /><br />
+<a class='button' href='/login'>Log In</a>
 <div id='footer'>
 	Note that Curious Greg requires first-party cookies to be enabled. You may safely delete the cookie upon completing the connection process.<br />
 	Curious Greg will not function without JavaScript. Please ensure you have JavaScript enabled.
diff --git a/web.py b/web.py
index 203fcf0..832ed34 100755
--- a/web.py
+++ b/web.py
@@ -7,13 +7,14 @@
 import requests, sqlite3, json
 from mastodon import Mastodon
 from flask import Flask, render_template, request, session, redirect, url_for
+import bcrypt
 import urllib
 
 cfg = json.load(open("meta.json"))
 
-db = sqlite3.connect("database.db")
+db = sqlite3.connect("database.db") #TODO: switch to mysql so concurrency is possible
 c = db.cursor()
-c.execute("CREATE TABLE IF NOT EXISTS `data` (secret TEXT NOT NULL, appid TEXT NOT NULL, appsecret TEXT NOT NULL, cc VARCHAR, latest_post VARCHAR)")
+c.execute("CREATE TABLE IF NOT EXISTS `data` (username TEXT NOT NULL, instance TEXT NOT NULL, secret TEXT NOT NULL, appid TEXT NOT NULL, appsecret TEXT NOT NULL, cc TEXT, latest_post TEXT, latest_timestamp TEXT, time_between_checks INT)")
 
 app = Flask(cfg['name'])
 app.secret_key = cfg['flask_key']
@@ -42,7 +43,7 @@ def internal_auth_a():
 
 	session['client_id'], session['client_secret'] = Mastodon.create_app(cfg['name'],
 		api_base_url=session['instance_url'],
-		scopes=["write:statuses"],
+		scopes=["write:statuses", "read:accounts"],
 		website=cfg['website'],
 		redirect_uris=['https://cg.lynnesbian.space/internal/auth_b']
 	)
@@ -50,11 +51,11 @@ def internal_auth_a():
 	params = {
 		"client_id": session['client_id'],
 		"client_secret":session['client_secret'],
-		"scope":"write:statuses",
+		"scope":"write:statuses+read:accounts",
 		"redirect_uri": "https://cg.lynnesbian.space/internal/auth_b",
 		"response_type":"code",
 	}
-	
+
 	url = "{}/oauth/authorize?{}".format(session['instance_url'], urllib.parse.urlencode(params))
 
 	return url
@@ -63,11 +64,22 @@ def internal_auth_a():
 def internal_auth_b():
 	session['secret'] = request.args.get('code')
 	#write details to DB
-	c.execute("INSERT INTO data (secret, appid, appsecret) VALUES (?, ?, ?, ?)", (session['secret'], session['client_id'], session['client_secret']))
+	client = Mastodon(access_token = session['secret'], api_base_url=session['instance_url'])
+	session['username'] = client.account_verify_credentials()['username']
+	session['acct'] = "@{}@{}".format(session['username'], session['instance_url'].replace("https://", ""))
+	if c.execute("SELECT COUNT(*) FROM data WHERE username LIKE ? AND instance LIKE ?", (session['username'], session['instance_url'])).fetchone()[0] > 0:
+		#user already has an account with CG
+		return redirect(url_for('log_in'))
+	c.execute("INSERT INTO data (username, instance, secret, appid, appsecret) VALUES (?, ?, ?, ?, ?)", (session['username'], session['instance_url'], session['secret'], session['client_id'], session['client_secret']))
 	db.commit()
+	return redirect(url_for('home'))
 
 @app.route('/debug')
 def print_debug_info():
 	return json.dumps(session._get_current_object())
 
+@app.route('/login')
+def log_in():
+	return render_template("login.html")
+
 	# return(json.dumps(client_info))