Update readme

README.md

@@ -6,22 +6,19 @@
 This is a lightweight Rust crate for verifying NUBAN numbers
 for all Nigerian bank accounts as was directed by the CBN.
 
-### What does it do?
+## What does it do?
 
 It checks the validity of a Nigerian bank account number based on the NUBAN guidelines provided by the CBN.
 
-
 ### How to use
 
 ```rust
-    extern crate nuban;
-
     use nuban::Nuban;
 
     fn main() {
         // pass the bank code and account number as arguments
         let nuban = Nuban::new("058", "0739082716").unwrap();
-        if let Ok(true) = nuban.is_valid() {
+        if let Ok(true) = nuban.is_valid_account() {
             println!("'{}' is a valid account number", nuban.account_number());
         } else {
             println!("'{}' is not a valid account number", nuban.account_number());
@@ -32,50 +29,25 @@ It checks the validity of a Nigerian bank account number based on the NUBAN guid
 Create a `NUBAN` instance using the conventional `new` method
 
 ```rust
-    let nuban = Nuban::new("098", "1038489302").unwrap();
+    let nuban = Nuban::new("098", "1038489302");
 ```
 
-The `new` method returns a `Result` type. It returns an `Err()` type for invalid account number or bank code. Typically when the length of `BANK_CODE` is not equal to `3` or the length of `ACCOUNT_NUMBER` is not equal to `10`.
-
 To check validity on a `NUBAN` instance:
-```rust
-    println!("{}", nuban.is_valid().unwrap());
-```
-
-Also, You have access to helpful methods when using this crate:
-
-> `get_bank_name(&self)`
-
-Returns the full name of the bank. Returns `Err("Bank not found")` for invalid codes.
-
-> `calculate_check_digit(&self)`
-
-Returns the correct check digit of the account number.
-
-> `banks(&self)`
-
-Returns a `HashMap` of all the banks with their codes.
-
-
-### Extra Features
-
-+ Get full bank name for valid NUBANs
 
 ```rust
-    let nuban = Nuban::new("058", "0739082716").unwrap();
-    println!("{}", nuban.get_bank_name());
+    println!("{}", nuban.is_valid_account().unwrap());
 ```
 
-## Contributing
+### Contributing
 
 - Create an issue if you spot any bug.
 - Feel free to fork and fix or extend the feature.
 - Run `cargo test` to ensure all tests are passing.
 - Add tests for your new features if you can.
 - Send in your pull request 🔥🔥
 
-## Other
+### Other
 
 Like this crate? Please star this repo.
 
-You can give me a shoutout on [Twitter](https://twitter.com/timolinn_)
+You can give me a shoutout on [Twitter](https://twitter.com/timolinn_)