Expose get_current_timestamp

Closes #152

src/lib.rs

@@ -24,4 +24,4 @@ pub use decoding::{
 };
 pub use encoding::{encode, EncodingKey};
 pub use header::Header;
-pub use validation::Validation;
+pub use validation::{get_current_timestamp, Validation};

src/validation.rs

@@ -97,7 +97,8 @@ impl Default for Validation {
     }
 }
 
-fn get_current_timestamp() -> u64 {
+/// Gets the current timestamp in the format JWT expect
+pub fn get_current_timestamp() -> u64 {
     let start = SystemTime::now();
     start.duration_since(UNIX_EPOCH).expect("Time went backwards").as_secs()
 }