add quotes to template

uwsgi-python/templates/apps/alumnigraph.j2

@@ -11,9 +11,9 @@ MAIL_REPLY_TO = "{{ alumni_graph_mail_reply_to }}"
 SERVER_NAME = "{{ alumni_graph_server_name }}"
 #PREFERRED_URL_SCHEME = "https"
 
-MAIL_SERVER = {{ alumni_graph_mail_server }}
+MAIL_SERVER = "{{ alumni_graph_mail_server }}"
 MAIL_PORT = {{ alumni_graph_mail_port }}
 MAIL_USE_TLS = {{ alumni_graph_mail_tls }}
-MAIL_USERNAME = {{ alumni_graph_mail_user }}
-MAIL_PASSWORD = {{ alumni_graph_mail_pass }}
+MAIL_USERNAME = "{{ alumni_graph_mail_user }}"
+MAIL_PASSWORD = "{{ alumni_graph_mail_pass }}"