tests: add authentication unit tests

pubspec.lock

@@ -9,6 +9,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "82.0.0"
+  adaptive_number:
+    dependency: transitive
+    description:
+      name: adaptive_number
+      sha256: "3a567544e9b5c9c803006f51140ad544aedc79604fd4f3f2c1380003f97c1d77"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.0"
   analyzer:
     dependency: transitive
     description:
@@ -349,6 +357,14 @@ packages:
       relative: true
     source: path
     version: "0.1.3"
+  dart_jsonwebtoken:
+    dependency: transitive
+    description:
+      name: dart_jsonwebtoken
+      sha256: "21ce9f8a8712f741e8d6876a9c82c0f8a257fe928c4378a91d8527b92a3fd413"
+      url: "https://pub.dev"
+    source: hosted
+    version: "3.2.0"
   dart_style:
     dependency: "direct main"
     description:
@@ -381,6 +397,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.5.0"
+  ed25519_edwards:
+    dependency: transitive
+    description:
+      name: ed25519_edwards
+      sha256: "6ce0112d131327ec6d42beede1e5dfd526069b18ad45dcf654f15074ad9276cd"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.3.1"
   equatable:
     dependency: transitive
     description:
@@ -1246,6 +1270,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "2.1.8"
+  pointycastle:
+    dependency: transitive
+    description:
+      name: pointycastle
+      sha256: "92aa3841d083cc4b0f4709b5c74fd6409a3e6ba833ffc7dc6a8fee096366acf5"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.0"
   pool:
     dependency: transitive
     description: