diff --git a/Cargo.lock b/Cargo.lock
index 65d5671..993bfce 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -385,12 +385,12 @@ dependencies = [
 
 [[package]]
 name = "diesel"
-version = "1.3.3"
+version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "byteorder 1.2.6 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "diesel_derives 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "diesel_derives 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "mysqlclient-sys 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "r2d2 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "url 1.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -398,12 +398,12 @@ dependencies = [
 
 [[package]]
 name = "diesel_derives"
-version = "1.3.0"
+version = "1.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "proc-macro2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.13.11 (registry+https://github.com/rust-lang/crates.io-index)",
+ "proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)",
+ "syn 0.15.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -1022,14 +1022,6 @@ name = "pkg-config"
 version = "0.3.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "proc-macro2"
-version = "0.3.8"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "proc-macro2"
 version = "0.4.20"
@@ -1044,7 +1036,7 @@ version = "0.1.0"
 dependencies = [
  "actix-web 0.7.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "chrono 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "diesel 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
+ "diesel 1.4.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "dotenv 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "env_logger 0.6.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "futures 0.1.25 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -1059,14 +1051,6 @@ name = "quick-error"
 version = "1.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "quote"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "quote"
 version = "0.6.8"
@@ -1320,16 +1304,6 @@ name = "string"
 version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "syn"
-version = "0.13.11"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "proc-macro2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "syn"
 version = "0.14.9"
@@ -1868,8 +1842,8 @@ dependencies = [
 "checksum curl 0.4.19 (registry+https://github.com/rust-lang/crates.io-index)" = "c7c9d851c825e0c033979d4516c9173bc19a78a96eb4d6ae51d4045440eafa16"
 "checksum curl-sys 0.4.16 (registry+https://github.com/rust-lang/crates.io-index)" = "ca79238a79fb294be6173b4057c95b22a718c94c4e38475d5faa82b8383f3502"
 "checksum dbghelp-sys 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "97590ba53bcb8ac28279161ca943a924d1fd4a8fb3fa63302591647c4fc5b850"
-"checksum diesel 1.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "164080ac16a4d1d80a50f0a623e4ddef41cb2779eee85bcc76907d340dfc98cc"
-"checksum diesel_derives 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)" = "03bcaf77491f53e400d5ee3bdd57142ea4e1c47fe9217b3361ff9a76ca0e3d37"
+"checksum diesel 1.4.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a2469cbcf1dfb9446e491cac4c493c2554133f87f7d041e892ac82e5cd36e863"
+"checksum diesel_derives 1.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "62a27666098617d52c487a41f70de23d44a1dc1f3aa5877ceba2790fb1f1cab4"
 "checksum dotenv 0.13.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c0d0a1279c96732bc6800ce6337b6a614697b0e74ae058dc03c62ebeb78b4d86"
 "checksum dtoa 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6d301140eb411af13d3115f9a562c85cc6b541ade9dfa314132244aaee7489dd"
 "checksum encoding 0.2.33 (registry+https://github.com/rust-lang/crates.io-index)" = "6b0d943856b990d12d3b55b359144ff341533e516d94098b1d3fc1ac666d36ec"
@@ -1944,10 +1918,8 @@ dependencies = [
 "checksum phf_generator 0.7.23 (registry+https://github.com/rust-lang/crates.io-index)" = "03dc191feb9b08b0dc1330d6549b795b9d81aec19efe6b4a45aec8d4caee0c4b"
 "checksum phf_shared 0.7.23 (registry+https://github.com/rust-lang/crates.io-index)" = "b539898d22d4273ded07f64a05737649dc69095d92cb87c7097ec68e3f150b93"
 "checksum pkg-config 0.3.14 (registry+https://github.com/rust-lang/crates.io-index)" = "676e8eb2b1b4c9043511a9b7bea0915320d7e502b0a079fb03f9635a5252b18c"
-"checksum proc-macro2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "1b06e2f335f48d24442b35a19df506a835fb3547bc3c06ef27340da9acf5cae7"
 "checksum proc-macro2 0.4.20 (registry+https://github.com/rust-lang/crates.io-index)" = "3d7b7eaaa90b4a90a932a9ea6666c95a389e424eff347f0f793979289429feee"
 "checksum quick-error 1.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9274b940887ce9addde99c4eee6b5c44cc494b182b97e73dc8ffdcb3397fd3f0"
-"checksum quote 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "9949cfe66888ffe1d53e6ec9d9f3b70714083854be20fd5e271b232a017401e8"
 "checksum quote 0.6.8 (registry+https://github.com/rust-lang/crates.io-index)" = "dd636425967c33af890042c483632d33fa7a18f19ad1d7ea72e8998c6ef8dea5"
 "checksum r2d2 0.8.3 (registry+https://github.com/rust-lang/crates.io-index)" = "5d746fc8a0dab19ccea7ff73ad535854e90ddb3b4b8cdce953dd5cd0b2e7bd22"
 "checksum rand 0.4.3 (registry+https://github.com/rust-lang/crates.io-index)" = "8356f47b32624fef5b3301c1be97e5944ecdd595409cc5da11d05f211db6cfbd"
@@ -1981,7 +1953,6 @@ dependencies = [
 "checksum socket2 0.3.8 (registry+https://github.com/rust-lang/crates.io-index)" = "c4d11a52082057d87cb5caa31ad812f4504b97ab44732cd8359df2e9ff9f48e7"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
 "checksum string 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "00caf261d6f90f588f8450b8e1230fa0d5be49ee6140fdfbcb55335aff350970"
-"checksum syn 0.13.11 (registry+https://github.com/rust-lang/crates.io-index)" = "14f9bf6292f3a61d2c716723fdb789a41bbe104168e6f496dc6497e531ea1b9b"
 "checksum syn 0.14.9 (registry+https://github.com/rust-lang/crates.io-index)" = "261ae9ecaa397c42b960649561949d69311f08eeaea86a65696e6e46517cf741"
 "checksum syn 0.15.13 (registry+https://github.com/rust-lang/crates.io-index)" = "7b4439ee8325b4e4b57e59309c3724c9a4478eaeb4eb094b6f3fac180a3b2876"
 "checksum synstructure 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ec37f4fab4bafaf6b5621c1d54e6aa5d4d059a8f84929e87abfdd7f9f04c6db2"
diff --git a/Cargo.toml b/Cargo.toml
index 35cf92d..0d36a00 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -5,7 +5,7 @@ authors = ["Subhojit Paul <subhojitpaul21@gmail.com>"]
 
 [dependencies]
 actix-web = { version = "^0.7", features = ["ssl"] }
-diesel = { version = "1.3.3", features = ["mysql", "chrono", "r2d2"] }
+diesel = { version = "^1.4", features = ["mysql", "chrono", "r2d2"] }
 dotenv = "0.13.0"
 serde = "1.0.80"
 serde_derive = "1.0.80"
diff --git a/src/github.rs b/src/github.rs
index 35360a7..25ebf1a 100644
--- a/src/github.rs
+++ b/src/github.rs
@@ -1,17 +1,13 @@
 use crate::AppState;
 use crate::models;
-use actix_web::actix;
 use actix_web::client;
 use actix_web::client::ClientResponse;
 use actix_web::error::Error;
 use actix_web::AsyncResponder;
-use actix_web::FutureResponse;
 use actix_web::HttpRequest;
 use actix_web::HttpResponse;
 use dotenv::dotenv;
 use futures::Future;
-use serde_derive::Deserialize;
-use serde_derive::Serialize;
 use std::env;
 
 pub fn login_page(_: &HttpRequest<AppState>) -> HttpResponse {