Added EnvVar and modified functions

src/lib.rs

@@ -1,2 +1,15 @@
 pub mod environment;
 pub mod keys;
+
+#[derive(Debug, Default, Clone)]
+pub struct EnvVar {
+    pub key: String,
+    pub value: String,
+}
+
+pub fn init_envvar(key: &str, value: &str) -> EnvVar {
+    EnvVar {
+        key: key.to_string(),
+        value: value.to_string(),
+    }
+}