OneUnited Bank has introduced a new credit card aimed at consumers who are trying to repair bad credit. The credit card, billed as the “comeback card” will initially be marketed in the bank’s three primary locations -- Boston, Los Angeles, and Miami -- said Teri Williams, the bank’s president. As customers establish a history of on-time payments, they can rebuild their credit, allowing them to qualify for traditional cards and other loans. “These are people who have hit a bump in the road,” Williams said. “We can relate, whether personally or as an institution, when you hit a bump in the road. The message that we would like to send is that you can come back from that.” said OneUnited President Teri Williams.