Added token fetcher utility script

util/tokenfetcher.py

@@ -0,0 +1,45 @@
+# 1) Configure below
+# 2) pip install esipy Flask
+# 3) FLASK_APP=tokenfetcher.py flask run
+# 4) Wait a couple of seconds for the browser to open
+
+import webbrowser
+
+from esipy import App
+from esipy import EsiClient
+from esipy import EsiSecurity
+
+from flask import Flask, request
+
+CLIENT_ID = ''
+SECRET_KEY = ''
+SCOPES = ['esi-universe.read_structures.v1', 'esi-markets.structure_markets.v1']
+
+app = Flask(__name__)
+esi_app = App.create(url="https://esi.tech.ccp.is/latest/swagger.json?datasource=tranquility")
+
+security = EsiSecurity(
+    app=esi_app,
+    redirect_uri='http://127.0.0.1:5000/ESICallback',
+    client_id=CLIENT_ID,
+    secret_key=SECRET_KEY
+)
+
+client = EsiClient(
+    retry_requests=True,
+    header={'User-Agent': 'ESI Token Fetcher'},
+    security=security
+)
+
+webbrowser.open_new(security.get_auth_uri(scopes=SCOPES))
+
+@app.route('/ESICallback')
+def esi_callback():
+    code = request.args.get('code', '')
+
+    if code:
+        tokens = security.auth(code)
+        return str(tokens)
+    else:
+        return 'No code returned!'
+