criada a conexão com a api na api_get_pass.dart na tela tela login_screen.dart e feito a encrypt_password.dart

pubspec.lock

@@ -1,6 +1,20 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
+  args:
+    dependency: transitive
+    description:
+      name: args
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.4.0"
+  asn1lib:
+    dependency: transitive
+    description:
+      name: asn1lib
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.4.0"
   async:
     dependency: transitive
     description:
@@ -36,6 +50,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.16.0"
+  convert:
+    dependency: transitive
+    description:
+      name: convert
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.1.1"
+  crypto:
+    dependency: transitive
+    description:
+      name: crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.2"
   cupertino_icons:
     dependency: "direct main"
     description:
@@ -43,6 +71,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.5"
+  encrypt:
+    dependency: transitive
+    description:
+      name: encrypt
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "5.0.1"
   fake_async:
     dependency: transitive
     description:
@@ -79,8 +114,15 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  gainer_crypto:
+    dependency: "direct main"
+    description:
+      name: gainer_crypto
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.0.6"
   http:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
@@ -170,6 +212,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.4"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.7.2"
   sky_engine:
     dependency: transitive
     description: flutter