{
id: string, image_url: string,    first_name,    middle_name,    last_name,    gender,    email?,    address?,   phone?,
occupation, employer_name, employer_addr, verification_status: 0 | 1 | 2,
bank_details: [{    bank_name, account_name, account_number, bvn, sort_code}],
next_of_kins: [
    {first_name,middle_name,last_name,gender,email?, address?, phone?}
],
documents: [{name: string, url: string}]
}

/treasury/staff.investments/:leadId
// if no leadId is sent, all investments are expected
{
    status: string = '';
    id: string = '';
    product: {
        id: string, name: string, abbreviation: string,
        props?: {
            tenor_in_days?: boolean,
            tenor_in_months?: boolean,
            tenor_in_years?: boolean,
        }
    } = { id: '', name: '', abbreviation: '' };
    start_date: string = '';
    maturity_date: string = '';
    saved: Money = {
        currency: {
            id: '', name: '', html: ''
        },
        amount: 0
    };
    tenor: number = 0
}

POST /treasury/staff.transactions/
Params: {
    customer_id?: string,
    investment_id?: string
}
Response: {
    id: string;
    investment?: InvestmentData;
    transaction_type: string;
    credit: Money;
    debit: Money;
    balance: Money;
    date: string;
}